![]() \.\.\.\.\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(304): Iray - IRAY:RENDER :: 1.15 IRAY rend error: "buildInputs.instanceArray", "numInstances" is non-zero, but "instances" is null 16:47:04.414 Iray - IRAY:RENDER :: 1.15 IRAY rend info : Initializing OptiX for CUDA device 0 There is no proper channel to report this issue to NVIDIA as a user so because Iray and OptiX are connected I am posting here hoping that someone from NVIDIA OptiX team will pick it up and investigate. ![]() Since it worked in 430.86 I am going to assume it is a driver regression. With the latest 441.28 studio driver I just switch to Iray preview on an empty scene and it falls back to CPU. The only difference is that the newer the drivers the faster they fallback to CPU. As the title says, all display drivers after 430.86 seem to be causing Iray CPU fallback on both RTX and non-RTX cards, regardless of the amount of memory used by the scene.
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