griefith/test
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

* Moved the sample location for shading to the middle of the volumetric step. This fixes a nagging bug that would cause noise/odd moire-ish patterns, due to raytrace numerical errors:

Browse Source 
http://mke3.net/blender/devel/rendering/volumetrics/vol_clouds_moire.jpg
This commit is contained in:
Matt Ebb
2008-09-24 07:49:24 +00:00
parent a0a5198a03
commit 0417e79586
1 changed files with 6 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
source/blender/render/intern/source/volumetric.c
View File

@@ -401,7 +401,7 @@ static void volumeintegrate(struct ShadeInput *shi, float *col, float *co, float
float vec[3], stepvec[3] = {0.0, 0.0, 0.0};
float tau[3], step_emit[3], step_scatter[3] = {0.0, 0.0, 0.0};
int s;
float step_sta[3], step_end[3];
float step_sta[3], step_end[3], step_mid[3];
float col_behind[3];
float total_density = 0.f;
@@ -433,6 +433,9 @@ static void volumeintegrate(struct ShadeInput *shi, float *col, float *co, float
/* there's only any point shading here
* if there's actually some density to shade! */
if (density > 0.01f) {
step_mid[0] = step_sta[0] + (stepvec[0] * 0.5);
step_mid[1] = step_sta[1] + (stepvec[1] * 0.5);
step_mid[2] = step_sta[2] + (stepvec[2] * 0.5);
/* transmittance component (alpha) */
vol_get_attenuation(shi, tau, step_sta, step_end, density, stepsize);
@@ -444,8 +447,8 @@ static void volumeintegrate(struct ShadeInput *shi, float *col, float *co, float
//if (rgb_to_luminance(tr[0], tr[1], tr[2]) < 1e-3) break;
/* incoming light via emission or scattering (additive) */
vol_get_emission(shi, step_emit, step_sta, density);
vol_get_scattering(shi, step_scatter, step_end, stepsize, density);
vol_get_emission(shi, step_emit, step_mid, density);
vol_get_scattering(shi, step_scatter, step_mid, stepsize, density);
VecAddf(d_radiance, step_emit, step_scatter);