From dae8326d1e98632be42e525011c061d46c1d0e2a Mon Sep 17 00:00:00 2001 From: Sergey Sharybin Date: Mon, 8 Feb 2016 14:51:57 +0100 Subject: [PATCH] Fix T47356: Too sharp falloww with Burley BSSRDF After the clamping commit we need to bump BURLEY_TRUNCATE constant a bit, otherwise mean free path does not really match the disk radius needed for importance sampling. --- intern/cycles/kernel/closure/bssrdf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/intern/cycles/kernel/closure/bssrdf.h b/intern/cycles/kernel/closure/bssrdf.h index a53fedb930a..2e32795a781 100644 --- a/intern/cycles/kernel/closure/bssrdf.h +++ b/intern/cycles/kernel/closure/bssrdf.h @@ -181,7 +181,7 @@ ccl_device void bssrdf_cubic_sample(ShaderClosure *sc, float xi, float *r, float * the mean free length, but still not too big so sampling is still * effective. Might need some further tweaks. */ -#define BURLEY_TRUNCATE 10.0f +#define BURLEY_TRUNCATE 30.0f #define BURLEY_TRUNCATE_CDF 0.973233f // cdf(BURLEY_TRUNCATE) ccl_device_inline float bssrdf_burley_fitting(float A)