diff options
author | Lukas Stockner <lukas.stockner@freenet.de> | 2017-05-20 00:04:13 +0300 |
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committer | Lukas Stockner <lukas.stockner@freenet.de> | 2017-05-20 00:31:49 +0300 |
commit | 3dee1f079f3ac84a649dda90f920610681ffb52d (patch) | |
tree | f1dda619129ca9befbe28c15aa3e71f0409ec54f /intern/cycles/kernel/filter | |
parent | 177385dc439b4f6b478a033413a8df992e7f5ed3 (diff) |
Fix T51560: Black pixels on a denoising render
Once again, numerical instabilities causing the Cholesky decomposition to fail.
However, further increasing the diagonal correction just because of a few
pixels in very specific scenes and settings seems unjustified.
Therefore, this commit simply falls back to the basic NLM-filtered pixel
if the more advanced model fails.
Diffstat (limited to 'intern/cycles/kernel/filter')
-rw-r--r-- | intern/cycles/kernel/filter/filter_reconstruction.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/intern/cycles/kernel/filter/filter_reconstruction.h b/intern/cycles/kernel/filter/filter_reconstruction.h index 13e90f8233b..dc90f318570 100644 --- a/intern/cycles/kernel/filter/filter_reconstruction.h +++ b/intern/cycles/kernel/filter/filter_reconstruction.h @@ -85,9 +85,17 @@ ccl_device_inline void kernel_filter_finalize(int x, int y, int w, int h, const int stride = storage_stride; #endif + /* The weighted average of pixel colors (essentially, the NLM-filtered image). + * In case the solution of the linear model fails due to numerical issues, + * fall back to this value. */ + float3 mean_color = XtWY[0]/XtWX[0]; + math_trimatrix_vec3_solve(XtWX, XtWY, (*rank)+1, stride); float3 final_color = XtWY[0]; + if(!isfinite3_safe(final_color)) { + final_color = mean_color; + } ccl_global float *combined_buffer = buffer + (y*buffer_params.y + x + buffer_params.x)*buffer_params.z; final_color *= sample; |