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| author | Brecht Van Lommel <brecht@blender.org> | 2021-02-22 02:00:56 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brecht@blender.org> | 2021-02-22 02:22:20 +0300 |
| commit | af940c68cbed7e840d6ae58f2645ff12ed6abffb (patch) | |
| tree | 336ad913bc22f2bbc0f8f9a7eb76a686abae86b9 | |
| parent | a3f091d7ceda77181422625135225e55afa612c8 (diff) | |
Fix Cycles world volume scattering missing light in some cases
With very large distances there were precision / overflow errors, normalize
the average albedo to avoid that. This was causing test failures on macOS
Arm, but also other architectures had slightly wrong results.
Ref T78710
| -rw-r--r-- | intern/cycles/kernel/kernel_volume.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/intern/cycles/kernel/kernel_volume.h b/intern/cycles/kernel/kernel_volume.h index 2e73da166b9..e46b0436107 100644 --- a/intern/cycles/kernel/kernel_volume.h +++ b/intern/cycles/kernel/kernel_volume.h @@ -840,7 +840,7 @@ ccl_device void kernel_volume_decoupled_record(KernelGlobals *kg, /* compute average albedo for channel sampling */ if (closure_flag & SD_SCATTER) { - accum_albedo += dt * safe_divide_color(coeff.sigma_s, sigma_t); + accum_albedo += (dt / ray->t) * safe_divide_color(coeff.sigma_s, sigma_t); } /* compute accumulated transmittance */ |