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Cycles: Flip image vertically before passing to OptiX denoiser to improve result quality

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Experiments have shown that the OptiX denoiser performs best when
operating on images that have their origin at the top-left corner,
while Blender renders with the origin at the bottom-left corner.
Simply flipping the image vertically before and after denoising is a
relatively trivial operation, so this patch introduces this as an
additional preprocessing and postprocessing step for denoising when the
OptiX denoiser is used. Additionally, this patch also removes an unused
helper function, now that OptiX 8.0 is the minimum.

Pull Request: https://projects.blender.org/blender/blender/pulls/145358
This commit is contained in:
Patrick Mours
2025-09-04 16:04:23 +02:00
committed by Patrick Mours
parent 7250eef0a3
commit b4bb075285
7 changed files with 125 additions and 194 deletions
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4
intern/cycles/kernel/device/oneapi/kernel.cpp
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@@ -673,6 +673,10 @@ bool oneapi_enqueue_kernel(KernelContext *kernel_context,
kg, cgh, global_size, local_size, args, oneapi_kernel_filter_color_postprocess);
break;
}
case DEVICE_KERNEL_FILTER_COLOR_FLIP_Y: {
oneapi_call(kg, cgh, global_size, local_size, args, oneapi_kernel_filter_color_flip_y);
break;
}
case DEVICE_KERNEL_CRYPTOMATTE_POSTPROCESS: {
oneapi_call(
kg, cgh, global_size, local_size, args, oneapi_kernel_cryptomatte_postprocess);