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Fix T76947: Optix realtime denoiser progressively reduces brightness of very bright objects 

The input data to the OptiX denoiser was clamped to 0..10000 as required, but it could easily
exceed that range with a high number of samples (since the data contains the overall sum). To
fix that, divide by the number of samples first and multiply it back in after the denoiser ran.
This commit is contained in:
Patrick Mours 2020-05-27 15:17:47 +02:00
parent 1c3b2b5dd8
commit 28d9368538
Notes: blender-bot 2023-02-14 00:29:15 +01:00 
Referenced by issue #76947, Optix realtime denoiser progressively reduces brightness of very bright objects.
2 changed files with 9 additions and 8 deletions
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3
intern/cycles/device/device_optix.cpp
View File

@ -924,7 +924,8 @@ class OptiXDevice : public CUDADevice {
&rtiles[9].h,
&rtiles[9].offset,
&rtiles[9].stride,
&task.pass_stride};
&task.pass_stride,
&rtile.sample};
launch_filter_kernel(
"kernel_cuda_filter_convert_from_rgb", rtiles[9].w, rtiles[9].h, output_args);
# endif

14
intern/cycles/kernel/kernels/cuda/filter.cu
View File

@ -57,9 +57,9 @@ kernel_cuda_filter_convert_to_rgb(float *rgb, float *buf, int sw, int sh, int st
if (num_inputs > 0) {
float *in = buf + x * pass_stride + (y * stride + pass_offset.x) / sizeof(float);
float *out = rgb + (x + y * sw) * 3;
out[0] = clamp(in[0], 0.0f, 10000.0f);
out[1] = clamp(in[1], 0.0f, 10000.0f);
out[2] = clamp(in[2], 0.0f, 10000.0f);
out[0] = clamp(in[0] / num_samples, 0.0f, 10000.0f);
out[1] = clamp(in[1] / num_samples, 0.0f, 10000.0f);
out[2] = clamp(in[2] / num_samples, 0.0f, 10000.0f);
}
if (num_inputs > 1) {
float *in = buf + x * pass_stride + (y * stride + pass_offset.y) / sizeof(float);
@ -80,16 +80,16 @@ kernel_cuda_filter_convert_to_rgb(float *rgb, float *buf, int sw, int sh, int st
extern "C" __global__ void
CUDA_LAUNCH_BOUNDS(CUDA_THREADS_BLOCK_WIDTH, CUDA_KERNEL_MAX_REGISTERS)
kernel_cuda_filter_convert_from_rgb(float *rgb, float *buf, int ix, int iy, int iw, int ih, int sx, int sy, int sw, int sh, int offset, int stride, int pass_stride)
kernel_cuda_filter_convert_from_rgb(float *rgb, float *buf, int ix, int iy, int iw, int ih, int sx, int sy, int sw, int sh, int offset, int stride, int pass_stride, int num_samples)
{
int x = blockDim.x*blockIdx.x + threadIdx.x;
int y = blockDim.y*blockIdx.y + threadIdx.y;
if(x < sw && y < sh) {
float *in = rgb + ((ix + x) + (iy + y) * iw) * 3;
float *out = buf + (offset + (sx + x) + (sy + y) * stride) * pass_stride;
out[0] = in[0];
out[1] = in[1];
out[2] = in[2];
out[0] = in[0] * num_samples;
out[1] = in[1] * num_samples;
out[2] = in[2] * num_samples;
}
}