Shin Fujieda

### PURPOSE Update Radeon ProRender to 3.1.5. ### EFFECT OF CHANGE - Fix the contours-disappearing issue with some transparent shapes - Fix wrong indexed texture access

Update Northstar to 3.1.5

Rendering the scenes in Houdini20, which was created in Houdini19, shows unexpected results

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When rendering the scene in Houdini20, created in Houdini19, we see a different behavior from Houdini19. For example, rendered images on Houdini 20 shows the following behaviors: - Lighting and...

RPR cannot render the default materials attached to objects like the rubber toy model both in H20 and H20.5, though it can be rendered on H19. This is likely caused...

Background image setting does not work in RPR:  However, RPR should have such functionality: https://github.com/GPUOpen-LibrariesAndSDKs/RadeonProRenderSDK/blob/master/RadeonProRender/inc/RadeonProRender_v2.h#L2970-L2986 So it would be better if this can be hooked up in Houdini RPR.