Physically based renderers, such as Iray, tries to approximate the physics of reality. For each point on the screen, it shoots out a ray from the camera to that point, then tries to determine its color/value. However, it is simply not possible to calculate the value of a point with real-world accuracy, because we would need to sample light coming in from an infinite number of directions.

Therefore, our Iray renderer must guess what the value of a point is by sampling light from a set of different but finite angles. The more samples we collect or iterations we run, the more time it takes, but the better our guess will be. As we collect more and more samples, we will ultimately converge on a likely answer.

Noise arises when we guess incorrectly, so the value of a particular point widely differs from what it should be. As you may have noticed though, some scenes take longer to converge than others, and some scenes are more noisy than others. What then determines the amount of noise in an Iray scene?

Why Is There Noise in My Daz Studio Iray Render and How to Remove It

What Determines the Amount of Noise in an Iray Scene?

Based on my own Daz Studio experiences, Iray scene noise seems most pronounced when there are small, extremely bright areas in the scene. For example, when most of the scene light is coming from small and bright light sources, specular indirect lighting, or doorways and windows.

In the Fantasy Girl with Horns scene above, there are many bright but small areas of light in the environment map because the sun is peeking through the trees. These small areas of light create noise on the water, which gets compounded as it bounces off that surface and hits others objects in the scene (indirect lighting).

For a more simple case of noise and small, very bright areas, I placed a point light between a fantasy woman’s hands. A point light has a small surface area. When it is the main source of light in a scene, there will likely be a lot of noise.

In some cases, our collected samples may miss the small light altogether, creating a dark spot. In other cases, we may randomly sample in the direction of the light, creating a higher value than reality. Depending on the strength of the light, this value may be very high, thereby significantly skewing our average guess.

Below, we have a zoomed in image with just the point light turned on (all other lights are off). Notice that there is quite a lot of noise when a small bright light is producing most of the illumination in the scene.

Zoomed in image with just the point light turned on. Rendered in Daz Studio Iray for about 10 minutes.

If we increase the strength of the point light, then the picture noise increases (see below).

Point light strength increased by a factor of 10. Rendered in Daz Studio Iray for about 10 minutes.

If we render the point light in a volumetric space, there is even more noise. This is because we are sampling for the entire volume (including the points in-between the hands), which increases the frequency of errors.

If we render the point light in a volumetric space, there is also more noise. This is because we are sampling for the entire volume as opposed to just the object surfaces.

Another noise problem area is when there are caustics. Water, for example, bends light (refraction) and focuses it, essentially making the lighted areas smaller and brighter. This creates interesting light patterns on the water floor. However, because of this light bending property, the direction of our pixel samples become even more important and more susceptible to light misses or accidental hits.

The general take-away here is that –

Small bright areas with high values create more noise than wide bright areas.

Specular, reflective, or refractive surfaces can further increase scene noise. Specular and reflective surfaces increase the number of small and bright areas, each of which serves as an indirect light source. By understanding the source of noise in our Daz Studio Iray renders, we can better control it in our images.

How Do We Reduce Noise in Our Iray Render?

I use four key methods to reduce noise in my Daz Studio Iray images.

1. Adjust Iray Render Settings.
2. Increase the amount of light in the scene.
3. Render at a higher resolution (larger image), then resize down to average out the noise.
4. Remove some of the noise in post-work by using despeckle or blur operations in Photoshop.

1. Adjust Iray Render Settings to Reduce Noise

One of the easiest ways to reduce noise in our Iray renders is to increase the number of samples we collect. The more samples we collect, the better our guess will be (i.e. the closer our guess converges to the actual value). We can do this by going to the Render Settings tab, and then selecting Progressive Rendering.

My Render Settings > Progressive Rendering settings.

Many of these parameters control when rendering stops, and may override each other.

• Max Samples – Controls the number of samples collected per-pixel. The more samples we collect, the better our guess will be.
• Max Time – Controls the maximum amount of time before rendering stops. Note that the render will stop when either Max Samples or Max Time is reached. If we have a slower graphics card, we may want to increase Max Time.
• Rendering Quality – Based on Tobor’s experience, this controls when the Iray renderer considers a pixel to be converged. I.e. a higher quality value will take longer to reach a given level of convergence. Of course speed of convergence also depends on our hardware and scene.

  In more practical terms, Sickleyield defines this parameter as a multiplier for Max Samples and Max Time. I.e., it is a quick way to increase or reduce the time at which rendering stops. For example, when doing test renders we may reduce Rendering Quality and then push it up again for our final image.

• Rendering Converged Ratio – As I understand it convergence is a measure of how close our pixel value guess is to its real value. As such, we will never reach 100% convergence, because that is when our guess is 100% accurate, which can only happen when we have the ability to collect an infinite number of samples. As we have seen above, this measure is also partly determined by the Rendering Quality parameter.

I usually render each of my lights separately, so I end my renders manually based on the light layer. There are three more Render Settings parameters that pertain to noise.

• Firefly Filter Enable – Go to Render Settings > Filtering and make sure that Firefly Filter Enable is on. This will get the Iray renderer to filter out some of the noise in our image.
• Caustic Sampler – Go to Render Settings > Optimization. Turn on Caustic Sample *if* we have caustics in our scene. Note that this enables some additional tests in the renderer thereby increasing sampling time, so only turn it on as necessary.
• Architectural Sampler – Go to Render Settings > Optimization. Turn on Architectural Sampler if we have an internal scene with a lot of indirect lighting and light only coming from portals such windows or doors.

This post by Dave Smith has more detail on these Render Setting parameters. Increasing the number of samples collected is probably the most accurate way to reduce noise. However, it can also take a long time to converge.

2. Increase the Amount of Light

Earlier, we saw that scenes with more noise have light primarily coming directly or indirectly from small bright areas. For example, internal scenes where light is only coming from windows or doors.

One way to reduce noise is to increase the amount of light in our scene, for example by adding large mesh lights in an indoor scene or removing unnecessary walls and ceilings. Larger light sources will reduce the amount of noise in our picture. In addition, if we are getting light from many different directions, then the probability of totally missing a light source or getting overly skewed light values will be significantly reduced.

However, a problem with this approach is that we may flood our scene with too much light, thereby losing shadows, shape definition, and scene depth. The image below is an older image of mine where I used a lot of ambient light in 3Delight.

This is an older image of mine where I used a lot of ambient light in 3Delight. Because there is too much light I lose shadows and shape definition.

3. Render at a Higher Resolution

Another simple way to reduce Iray noise is to render our images at a higher resolution (larger size). When we shrink our image down in size, some of the noise will get averaged away. This is a better method than just using blurring techniques to average away the noise because it will retain picture sharpness and detail.

For example, the top image below is rendered at 1024 by 1331 pixels, at 300 iterations, and then cropped in height. The bottom image is rendered at 3000 by 3900 pixels, at 300 iterations, and then reduced in size to 1024 by 1331 pixels (similarly cropped in height). There is a lot less noise in the bottom image without a loss of sharpness or detail.

There is a lot less noise in the higher resolution image (bottom) without a loss of sharpness or detail.

4. Remove Scene Noise in Post-work

We can also remove some of the render noise in post-work using blurring or de-speckling operations. In Photoshop, I use Filter > Noise > Despeckle for less noisy renders and Filter > Blur > Gaussian Blur for noisy renders. The left image below is the original noisy render and the right image has been blurred with Gaussian Blur radius 3 pixels.

Remove Scene Noise with Blur or Despeckle operations.

The problem with Despeckle or Gaussian Blur is that we lose a lot of detail and sharpness, especially in our primary fantasy girl figure. One way to fix this is to create another render with just the girl. By removing the water, we remove a key source of noise in our scene. With a simpler scene, we can also render more iterations for a given time. Then, we use this low-noise image to sharpen the figure in our blurred image. To do this, I select the figure-sharpen layer and set the blending mode to Overlay. Then, I do Filter > Other > High Pass with a radius of 5 pixels.

Left – Gaussian Blurred image with much less noise but loss of detail. Right – Same image but with the girl figure sharpened using the technique described above.

Conclusion

I reduce noise in my Daz Studio Iray renders by using all four of the techniques above. However, I make sure to properly balance them out so that I do not weaken scene lighting, lose scene detail, or spend too much time rendering.

There are other methods for controlling noise in a path tracer like Iray. For example, seeding the renderer differently, clamping maximum light values, and more. However, as far as I know, such render settings are not currently available in Daz Studio. In any case, they each come with their own weakness.

With just the techniques described here though, I am able to get results that I am happy with. The completed Fantasy Girl with Horns image is shown below. We have added all our lights, removed noise, and applied our post-work process.

Final Fantasy Girl with Horns image. We combined all lights, removed noise, and warmed up the image in post.

1. Pd Iray Shader Kit 1

The Pd Iray Shader Kit 1 by parrotdolphin is one of my favorite products of 2015. It allows me to not only make previous 3Delight materials look good in Iray, but also effectively use many made-for-Poser cloth materials, with just a few clicks.

There is also the ability to add a metallic sheen to my cloth surfaces, or to add cool metallic patterns. In the example image below, I added the gold metallic sheen to the trim of the Fantasy Wrap dress, as well as the gold metallic patterns to the cloth she is holding.

Most clothing sets that I use have a combination of mostly cloth, metal, and leather parts. Therefore, combined with basic Iray metal shaders and Khory’s Iray leather shaders (described later), I can make most clothing sets render well in Iray without too much effort.

I applied shaders from Pd Iray Shader Kit 1 to all cloth surfaces in this image.

2. AtmoCam for Iray

I use AtmoCam for Iray by Marshian in almost every one of my Iray images. AtmoCam allows me to render light-rays, create atmosphere, fog effects, underwater effects, and more.

In the mermaid image below, I used AtmoCam to create my underwater effect. To do this, I rendered a light layer using the AtmoCam AzureSea setting and the AtmoCam HDR Env Render Setting.

I used AtmoCam for Iray to give my mermaid image a nice underwater atmosphere.

AtmoCam also works great for creating spell effects or providing atmosphere around emissive light surfaces. In the wolf pack image below, I rendered a volumetric light layer for a green point light on her right hand. This casts a nice green glow behind and to the side of my figure. The wolf pack is created using Wolf 2.0 by AM.

Green spell effect on our evil wizard’s right hand created with AtmoCam for Iray.

3. UHT Hair Shaders for Iray

Just as the Pd Iray Shader Kit allows me to make cloth materials look good in Iray, UHT Hair Shaders allow me to make 3Delight and Poser hair look good in Iray with just a few clicks. I especially like all the extra controls for adding displacement maps, back-scatter, shine, transparency, and more.

Used UHT Hair Shaders for Iray on StoryBrook Hair by Propschick and RPublishing.

I have tried other hair shader products, but so far, I like the render results I get from this one best. Note however, that these shaders work best on hair surfaces that are mapped to straight hair pieces. I usually continue to use the original hair textures for scalp surfaces and surfaces that have special (non-straight) hair patterns. Nevertheless, even there, I can still apply displacement, shine, and other hair options, to the original textures.

Another important thing to note is that the transparency options may not work on all hair surfaces. In these cases, we will have to edit the original transparency image maps, and strengthen it in an image processing program such as Photoshop. More details on hair transparency here.

In the image below, we apply UHT Hair Shaders to Tatiana Hair by 3Dream and Mairy.

In this image, we applied UHT Hair Shaders for Iray to Tatiana Hair by 3Dream and Mairy.

4. Iray Fashion Leathers

Another very common outfit shader are leather shaders. This is where Khory’s Iray Fashion Leathers comes in handy. In the Catwoman image below, I applied a black shader from the set to 3D-Age’s Cats outfit. The only additional thing I did, was to adjust UV tiling for the surfaces of the outfit so that I get the leather texture that I want, and so that the texture pattern is consistent throughout the outfit.

Used Iray Fashion Leathers on 3D-Age’s Cats outfit.

5. Iray Skin Shader

The truth is, I am still searching for a good Iray skin shader solution for older generation figures, especially Gen4. Currently, I am using JM HumanShader for Iray. However, the skin settings are a bit too glossy/shiny for my taste. I usually reduce the Top Coat Layer and Glossy Layered Weight values. Still though, the figure skins tend to have an air-brush quality to it.

Using JM HumanShader for Iray on a Victoria 4 character (Tempesta’s Yumi).

The Iray Converter for Genesis and Generation 4 Bundle by V3Digitimes looks like it could be an interesting and flexible solution. However, I am still waiting for a good sale before I can try it out.

Using Iray Uber Shader on a Victoria 4 character (Danae’s London).

The image below is the finished product of my water shader experiment. In this tutorial, I talk about the different parameters of the Iray water shader, and what I focused on to create my pin-up render.

Water Shader Tutorial for Daz Studio Iray

1. Water Shader

Barcelona Sunset environment map with zero rotation.

I create the scene as I normally would. Here I am using FWSA Gillian HD and LF Sorbet Swimwear, which fits in very well with a water pin-up scene. The only extra change I made here, is to make her skin appear more wet by increasing Glossy Reflectivity to 0.9, and decreasing Glossy Roughness to 0.4, for all skin surfaces.

Once I am done, I make a plane primitive and apply the Iray water shader to it. When I look at the surface properties of my water plane, there are two key properties – reflection and refraction.

a) Reflection

To get a good reflection on my water, I want to pick a good environment map and rotation angle. I like the Barcelona Rooftops HDR that I got from sIBL Archives, so I use it here, starting with zero rotation. Unfortunately, at this rotation, it is filled with large buildings and palm trees, which is not a very pleasing reflection on my water. Therefore, I adjust the rotation until I get an interesting far-away skyline, that I am happy with (rotation = 270 degrees).

I adjust the rotation of my Environment Map until I get a more open, far-away, skyline that I am happy with.

b) Refraction

Slight change of the camera angle so we can see more of the refracted foot.

Another important aspect of the Iray water shader is refraction. Light travels at a different speed in air than in water. Therefore, when light enters water, it gets bent (at the point of crossing), thereby allowing us to see more of the leg that is submerged. Without refraction, her foot would not be visible.

Submerged objects always appear to be shallower than they are because the light from them changes angle at the surface, bending downward toward the water.
~~[HyperPhysics]

Create a Ground Plane by duplicating my water plane.

However, because all we have is our water plane and there is no ground plane, her foot looks like it is not standing on anything. To fix this, I duplicate my water plane by going into Edit > Duplicate > Duplicate Node(s). This creates a duplicate plane which I call ‘Ground Plane’. Next, I apply the Concrete Iray shader to my ground plane, and then move it down so that my pin-up girl is standing on it.

Notice that there is now a shadow under her foot, and there are also interesting patterns on the water due to refraction of the ground plane.

I add a ground plane so that the pin-up girl’s refracted foot, under the water, is standing on a solid surface.

c) Waves

You will notice, that there is wind in our render that is blowing out our pin-up girl’s hair. This wind will also create waves/ripples on our water. To add waves to our currently flat water plane, we add in an appropriate normal map. We can do a search for “water normal map” or we can get a normal map from one of our existing environments.

Load my water normal map into the Normal Map parameter of my water plane.

Next, I edit my water plane surface, and load in my water normal map. I can increase the number of Horizontal and Vertical Tiles in my shader parameter, if I want to make my water be more wavy. Finally, I can also color my water plane, for example make my water appear more blue, by changing the Base Color parameter of my water plane.

Added waves on my water plane by loading in an appropriate water normal map.

2. Water Thin & Water Dispersive

The Water Thin Iray shader is just like the Water shader except that it has the Thin Walled parameter turned on. This just means that the water shader is only applied to the surface of the object, instead of the entire volume of the object.

Thin Walled – This property sets the volumetric effects of the surface. Compare a bubble (on) to a marble (off) for example.
~~[Daz Documentation Center]

When Thin Walled is Off, the bubbles look like droplets of water.

For example, cornea surfaces are often set to Water Thin. Another great example of a thin surface object are bubbles. In my first bubble image, I have the Thin Walled parameter set to Off. In this example, my bubbles look more like droplets of water rather than bubbles.

When Thin Walled is On, the bubbles look a lot more like bubbles.

Completed Pink Lady and Bubbles image.

Another very cool aspect of bubbles is that they have chromatic dispersion. These result in the many colors we may see on bubbles, in an oil slick, or in a rainbow.

A bubble film is a sort of sandwich: a layer of soap molecules, a filling of water molecules, and then another layer of soap molecules. When light waves reflecting from one layer of soap molecules meet up with light waves reflecting from the second layer of soap molecules, the two sets of waves interfere. Some waves add together, making certain frequencies or colors of light brighter. Other waves cancel each other, removing a frequency or color from the mixture. The colors that you see are what’s left after the light waves interfere.
~~[Exploratorium]

That is what the Water Dispersive Iray shader addresses. It has an additional parameter called Abbe.

Abbe is a conatant chromatic dispersion. Lower numbers (but greater than 0) give more dispersion on the surface, and the higher the value, the less dispersion. This works on surfaces with volume, not on Thin Walled surfaces.
~~[Daz Documentation Center]

Note that Abbe does not work on Thin Walled surfaces. Therefore, to test this out, I need a double layered bubble (i.e. a bubble that is geometrically represented by both an outer and inner layer). I found such a bubble in the 3D Bubbles product by MindVision G.D.S.

Water Dispersive Iray shader applied to two-sided bubbles. Abbe set to 2.

Chromatic dispersion works here. However, the two sided bubbles look a bit too substantial for bubbles, and ends up looking more like glass. Personally, I like the Thin Walled version best.

Another example image with Thin-Walled bubbles.

3. Under-Water Scene

There are two important aspects in an underwater scene, volumetric or atmospheric effects and caustics. I achieve my underwater atmospheric effect by using AtmoCam for Iray by Marshian. We can also set up our own volumetric cube by following some of the guidelines discussed here (in the Daz3D forum).

In optics, a caustic or caustic network is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface.
~~[Wikipedia]

In water, cool caustic patterns are made by the curves of surface waves. To generate these caustic patterns in my underwater scene, it is easiest and most time effective to fake it using a Gobo light.

1. I first did a search for “water caustics texture” and download some patterns that I like.
2. Then, I placed a spotlight up high up in my scene, and point it down at my focus area. I want it high enough so that it casts a bunch of almost parallel rays into my scene.

I invert my caustics image using the Layered Image Editor.
3. Next, I create a plane and apply my water caustics texture to the Cutout Opacity parameter of the plane. White represents opaque and black represents transparent. Therefore, I want my caustics lines to be in black and all the rest to be in white. If necessary, I can invert the image using the Layered Image Editor.
4. Finally I position the plane in front of my light so that it casts the proper shadows onto my underwater floor plane.

Finished underwater mermaid scene with caustics from a Gobo light.

Another way to achieve caustics is to do it for real by setting up an appropriate scene with appropriate shaders, and then letting the Iray renderer physically generate the water caustics pattern. This will take much longer to render, but will create more realistic looking results.

It was a big challenge for me to get Iray to generate caustic patterns in my underwater scene. I was finally only able to do it by using Overcomeon’s underwater caustic test scene.

Remember that the caustic patterns are formed by reflection and refraction off the curved surface of waves, on our water. Therefore, we will need waves on our water plane. In addition, reflection also plays a very important role to bounce off our light rays, thereby increasing the area where the patterns are created. To get caustics in my scene, I needed to place several large planes around my scene to bounce off my sunlight.

Finally, we also want to go to Render Settings > Optimization and turn ON the Caustic Sampler parameter. This will hopefully increase render efficiency of caustics in our scene. Note that this is just an optimization or render efficiency setting.

Finished underwater mermaid scene with real caustics from the Daz Studio Iray renderer.

In this tutorial, I will describe how I started out with Daz Studio Iray, and how I created a simple realistic render from start to finish. This tutorial is intended for Iray beginners who are already familiar with the standard Daz Studio Interface.

If you are only starting to use Daz Studio, then check out this Daz Studio for Beginners tutorial.

First Iray image I created with an image based light (IBL).

1. Creating the Scene and Materials

I create the scene in the same way as I would in regular Daz Studio. However, one very important aspect of getting a scene to look right in Iray is in using the right materials.

In this tutorial, I make a very simple scene with a female figure and a dragon tattoo on her back. She has interesting, long, wind-blown hair and is wearing a bikini. I make sure to use a highly detailed and realistic looking skin on my human figure. In this example, I am using the Bambolina skin by Tempesta3d. I also get pretty good results from the Daz3d Elite skins that I got from Michael 6 HD Add-On and Victoria 6 HD Add-On.

This simple scene allows me to focus on learning the basic material and lighting aspects of Iray.

This simple scene allows me to focus on learning the basic material and lighting aspects of Iray.

After I finish creating my scene, I need to apply Iray shaders to all of my scene objects (figures, clothing, props, environment). One simple way to do this, is to –

Expand all objects within our scene.
1. Click on the Scene Tab. Then, right-click on the Scene pane, and select Expand > Expand All.
2. I do Ctrl-A to select all items in my scene pane. Then I Ctrl-click to un-select lights and cameras.
3. Next, (a) I click on the Surfaces Tab, (b) click on Editor, and (c) select all the objects within it

Select all object surfaces in the scene.
4. Now, (a) I click on Presets. Within the Presets pane, (b) I select Shaders > Iray. If you are not using the Smart Content functionality within Daz Studio, you can get at the Iray shaders through your Content Library by going to Shader Presets > Iray > DAZ Uber in your Daz Studio directory. Finally, (c) I double click on the !Iray Uber Base shader to convert all the objects in my scene to using Iray shaders.

Apply Iray Uber Base shader to all object surfaces in my scene.
5. Note that Iray also has specialized shaders for glass, metal, water, fabric, leather, and more. At this point, I identify any special surfaces in my scene that fall into these categories, and assign them accordingly.

I select Ignore, and then click on Accept to to keep the original textures of my selected objects.
6. I do Ctrl-double click if I want to keep the original textures of my selected objects. This will open up a pop-up window. I select Ignore, and then click on Accept.

How to apply Iray shaders to my Genesis 2 Female figure.
7. There are also specialized shaders for Genesis 2 males and females. These shaders will use the existing skin textures that we have on our figure. Therefore, I select my female figure in the Scene pane, (a) go to the Surfaces Tab, (b) click on the Presets button, and (c) select Materials > Iray > Feminine. (d) I double click on the Iray Optimized Genesis 2 Female MAT to apply this shader on my figure.
8. Finally, I tweak my surfaces as needed. I find that the Iray skin shaders are a bit too glossy/shiny for my taste. Therefore, I select my G2F figure, go to Surfaces > Editor. Open up Genesis 2 Female and select Skin. Then I change the Glossy Layered Weight to 0.5.

How I lower the glossiness of the skin on my female figure.

This finishes the material setup of my simple scene. As I learn more of Iray and create more complex scenes, I will probably want to do more here to get the best render results. However, that is for a later time and tutorial. 🙂

2. Iray Image Based Light

A very simple way to light my Iray scene in a realistic way, is to use an image based light (IBL). To do this –

1. I go to (a) Render Settings > (b) Editor.
2. I select (c) Environment > Dome.
3. I assign an appropriate image to light my scene in the (d) Environment Map control. In this example I am using Barcelona Rooftops that I got from sIBL Archives. That is a great site to get free IBL images. Dimension Theory also has some great HDRI packs in his DAZ store.

   As far as I can tell, the Environment Map slider also controls IBL intensity. For example, rendering at Environment Intensity 1 and Environment Map 1 gets me the same result as rendering at Environment Intensity 0.5 and Environment Map 2.


How to set an image based light (IBL) in Daz Studio Iray.
4. Next, I set Dome Mode to Finite Sphere so that I have more control over how the image map is used in my scene. When I do this, additional controls appear including Dome Scale Multiplier, Dome Radius, and Dome Origin XYZ.

   Dome Scale Multipler and Dome Radius allows us to scale our environment map, and Dome Origin allows us to reposition our environment map. I set Dome Scale Multiplier to 3 so that I can see more of the image in my scene.


Setting Dome Mode to Finite Sphere so that I have more control over how the image map is used in my scene.

Iray render of scene with the render settings specified above.
5. Next, I want to position the sun in the image map at the right place so that it casts a nice rim or silhouette on my figure. To do this I need to better understand how my image maps onto the 3d-dome in my scene.

How the sections of our image based light map to the dome in our 3d-scene.

A simple way to think about it is to divide our image into four segments.

• Section A maps to the front of the dome (what we see in the scene).
• Section B maps to the right of the dome.
• Section C maps to the back of the dome.
• Section D maps to the left of the dome.

The four segments of our image map.

Essentially, the left of the image maps onto what we see, and then it goes clock-wise from there.

The sun in our image is in section C (back of the dome). Therefore, to move it to the front of my image, I rotate the dome by 180 degrees. This gives me a nice rim or silhouette effect on the left of my figure. Rotating 270 degrees shifts the light-rim to the right of my figure.

Iray render of scene with IBL dome rotated by 180 degrees.

However, it looks like there is also too much light in my scene, and there does not seem to be enough contrast between the rim set by the setting sun and the rest of the image. This is because of the camera headlamp.

In particular, if there are no lights in the scene (other than the IBL), Daz Studio automatically adds a headlamp to the top of the camera to light our scene. This headlamp is adding too much light and reducing the contrast of the IBL that I want. To turn off this headlamp, I simply add a Daz Studio light to the scene, and then turn that light off. In this way, the only light source is my image based light (IBL).

Iray render of scene with the Daz Studio camera headlamp turned off.

3. Postwork and Done!

Finally, I add some glow to my image, tone it to a more orange sunset color, lighten the figure a little bit, and I am done!

With an nVidia GeForce GTX TITAN X card, I was able to render a 1000×1300 version of the image in under 5 minutes.

Finished image after adding glow and tint.

Below is a more complex second scene that I made. I set the armor to the Iray iron shader (keeping my original textures), and I exported the lion hair as OBJ from the Look at My Hair plugin.

Lionheart – Daz Studio Iray render.