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Good day everyone,
I'm trying to re-render a scene of an aircraft's propeller starting up. I say re-render because I already render that scene once with the same aircraft, the same propeller, the same lighting, and the same motion blur settings correctly; the new scene has a different texture on the aircraft and a different airport as background. Everything else is the same. Unfortunately I cannot share the scene, and you'll have to forgive the heavily redacted pictures.
To my surprise, several frames show white areas in random spots on the blurred propeller blades, and I don't quite understand why. These areas mostly appear on the highlighted propeller blade, but can appear on others as well, and in different positions along the blades themselves.
I am outputting the specular render element, and noticed it's the only extra element (with the exception of noiseLevel) showing that smudge, so I disabled all specular highlights from the lights in the scene (a dome light with a HDR and one sun+sky), but that didn't solve the problem.
I'm quite stumped because the same propeller (in terms of geometry, materials, textures, motion blur settings) rendered fine in a previous scene (from which the animation and the motion blur settings come from); the scene is rendering on three different PCs managed by Deadline, and all three PCs might render these white areas. The areas appear throughout the animation, whether the propeller is just starting up or spinning at full speed.
I have rendered this scene three times and the frames in which the white areas appear and their size/shape differ if the blades receive or not specular highlights.
Aaaand...the white areas do show up in IPR if I let V-Ray refine the viewport long enough (usually at pass 8 see the first white dot, at pass 15 the area starts to be evident). If I try to render the "wrong" frames alone, the areas don't appear until the renderer processes the area (bucket renderer), while V-Ray builds the light cache the areas are not visible. If I switch to progressive render, the areas progressively appear as the engine refines the render.
I am quite lost. Help?
I'm trying to re-render a scene of an aircraft's propeller starting up. I say re-render because I already render that scene once with the same aircraft, the same propeller, the same lighting, and the same motion blur settings correctly; the new scene has a different texture on the aircraft and a different airport as background. Everything else is the same. Unfortunately I cannot share the scene, and you'll have to forgive the heavily redacted pictures.
To my surprise, several frames show white areas in random spots on the blurred propeller blades, and I don't quite understand why. These areas mostly appear on the highlighted propeller blade, but can appear on others as well, and in different positions along the blades themselves.
I am outputting the specular render element, and noticed it's the only extra element (with the exception of noiseLevel) showing that smudge, so I disabled all specular highlights from the lights in the scene (a dome light with a HDR and one sun+sky), but that didn't solve the problem.
I'm quite stumped because the same propeller (in terms of geometry, materials, textures, motion blur settings) rendered fine in a previous scene (from which the animation and the motion blur settings come from); the scene is rendering on three different PCs managed by Deadline, and all three PCs might render these white areas. The areas appear throughout the animation, whether the propeller is just starting up or spinning at full speed.
I have rendered this scene three times and the frames in which the white areas appear and their size/shape differ if the blades receive or not specular highlights.
Aaaand...the white areas do show up in IPR if I let V-Ray refine the viewport long enough (usually at pass 8 see the first white dot, at pass 15 the area starts to be evident). If I try to render the "wrong" frames alone, the areas don't appear until the renderer processes the area (bucket renderer), while V-Ray builds the light cache the areas are not visible. If I switch to progressive render, the areas progressively appear as the engine refines the render.
I am quite lost. Help?
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