forked from bartvdbraak/blender
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.
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@ -181,7 +181,7 @@ ccl_device void bssrdf_cubic_sample(ShaderClosure *sc, float xi, float *r, float
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* the mean free length, but still not too big so sampling is still
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* effective. Might need some further tweaks.
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*/
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#define BURLEY_TRUNCATE 10.0f
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#define BURLEY_TRUNCATE 30.0f
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#define BURLEY_TRUNCATE_CDF 0.973233f // cdf(BURLEY_TRUNCATE)
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ccl_device_inline float bssrdf_burley_fitting(float A)
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