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I have some simple cube particles in PFlow that collide on a flat surface so there are many that overlap one another. The cube particles are scaled in Z so they are for the most part, flat.
I have an opacity map in a V-Ray material with a radial gradient applied to the particles mapped from the top down so the end result is that each square particle is transparent on the edges and opaque in the middle.
Where the particles overlap, since they are co-incident, there are problems in the rendering with black splotches showing up. I found in the helpfile the secondary ray bias setting which does eliminate the black splotches but not the problem all together. The images below are TOP views looking straight down on the particles.
This image shows the original problem:
This image shows the effect of setting the secondary ray bias to a positive value. Notice that where the two particles overlap, the opacity is wrong:
The scanline renderer renders these overlapping particles without problem as you can see in the last image. Notice that where the two particles overlap, the opacity is correct:
How can I make V-Ray render these particles properly?
Thanks!
I have an opacity map in a V-Ray material with a radial gradient applied to the particles mapped from the top down so the end result is that each square particle is transparent on the edges and opaque in the middle.
Where the particles overlap, since they are co-incident, there are problems in the rendering with black splotches showing up. I found in the helpfile the secondary ray bias setting which does eliminate the black splotches but not the problem all together. The images below are TOP views looking straight down on the particles.
This image shows the original problem:
This image shows the effect of setting the secondary ray bias to a positive value. Notice that where the two particles overlap, the opacity is wrong:
The scanline renderer renders these overlapping particles without problem as you can see in the last image. Notice that where the two particles overlap, the opacity is correct:
How can I make V-Ray render these particles properly?
Thanks!
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