Once you are happy with the shading and lighting in the scene, it is time to adjust some of the Sampling and Ray Depth settings for final frame rendering.

Arnold Render Setup

Ray Depth

Diffuse Ray Depth

The images below were rendered using a Diffuse Ray Depth of (default) and (rollover image). You can notice a clear difference in the amount of bounced light in the scene.

Rollover image to see difference between Diffuse Ray Depth 1 (default) and 4

Note that render times will linearly increase with regards to the number of ray diffuse bounces and therefore care should be taken when increasing this value.

Transmission Ray Depth (Glass Doors)

This is the maximum number of times a ray can be refracted in the scene. Ensure that you have a high enough Transmission Ray Depth in the scene. The default value of 8 is enough in this case. However, you may need to increase this value if there are more refractive surfaces in the scene.

More information about rendering glass surfaces can be found here.

Specular Ray Depth (Lamp)

If we look at the metallic base of the lamp, we can see that there are some black areas in the specular reflections. This is due to there being a low Specular Ray Depth in the scene. Increasing this value reveals more glossy reflections in the scene.


  • For the final render, the Camera (AA) settings were increased to 6
  • The Diffuse Samples were also increased to reduce noise in indirectly lit areas of the room.

Care should be taken when increasing this value as your render times will increase dramatically.

More information and tutorials about removing noise can be found here.

Remember to save the rendered image as a 32-bit Open EXR file. That way you can further control the gamma and exposure levels of the image in a post-processing application.


That concludes this tutorial on rendering an interior bathroom scene with MAXtoA.

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