OptiX (CPU) tracking issue

[RDambrosio016]

Issue to track what needs to be done to complete the CPU (host) side of OptiX:

(me) Denoising:

• optixDenoiserComputeIntensity
• optixDenoiserComputeAverageColor
• setup_state_with_buffers
• Some way of running the denoiser with the same input and output image.
• AOV models
• Tiled denoising

(@anderslanglands) Actual Raytracing:

• port remaining iw examples
• port SDK examples necessary to test remaining features (e.g. motion blur, curves)
• implement instance transforms, motion blur