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If you feel IT is not interpreting the incoming image correctly you can override it using a long list of color profiles. This can be found in the main IT menu under View > Image Color Space > Automatic.
If everything is setup correctly in the Display mapping preferences, IT will be able to interpret images correctly. Remember to set IT to display 32-bit color depth (float) in the RMS render option box to avoid color banding and clipping. This can be found in the main IT menu under View > Display View > sRGB. Remember, IT is not actually modifying the image, it's only showing you the image with a sRGB LUT. This means you don't have to change anything if rendering to the framebuffer. Original Renderman Promo Video Here's an old promo that was released when RenderMan first became available to the public. #Renderman tutorial maya how to
RenderMan defaults IT to a sRGB LUT, which is the best way to view images rendered with a linear workflow. This tutorial comes via Lester Banks and shows you how to use RenderMan with Maya, as well as the PXRsurface and the lights in RenderMan. Now that we have effectively modified the input images, we need to view them correctly. Thankfully, PxrTexture has a simple Linearize checkbox you can enable if you need to gamma correct your texture. If you're using PxrTexture instead of Maya file nodes to read textures, you need to linearize textures manually. Which translates into wrong colors, wrong light, but proper display. No INPUTS are color managed, therefore all the CALCULATIONS happen incorrectly, but the OUTPUT display is in sRGB. This is another common example of bad color management. RIS is the new version that you want to be learning, and that might be why youre not seeing the options that they show in the tutorial. Make sure youve set your rendering engine to RIS in Mayas render settings. Which translates into wrong colors, wrong light and wrong display. There is A LOT to Renderman, but the tutorials on Pixars site should be a good start. No INPUTS are color managed, therefore all the CALCULATIONS happen incorrectly and the OUTPUT display is linear. This is the default in most applications including Maya. This is where the knowledge of a proper imaging workflow comes in to save the day. #Renderman tutorial maya full
This implementation allows RfM to augment its Fluids rendering capabilities with full support for Deep Shadows, Motion Blur, and Volume Scattering effects.
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In fact, the default gamma workflow for many 3D software is incorrect. RenderMan for Maya can render Maya Fluids, using the RiVolume primitive. This would be simple enough if every software would play by the same rules, but they don't. Pixar's IT viewer can compensate by showing the rendered image through a sRGB look up table (LUT), which is identical to what will be the final image after the sRGB gamma curve is applied in post.
Because the resulting linear image in not suitable for viewing, but contains all the proper data. Because light works linearly and therefore only works properly when it lights linear values.
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