by paride4331 » Thu Mar 30, 2017 12:23 pm
paride4331
Thu Mar 30, 2017 12:23 pm
Hi ramone163,
you have to use "alpha channel" Kernel setting and "shadow catcher" for cast shadows (in spread material).
About those concentric circles, check your scale units and the value of epsilon-ray.
The ray epsilon is the distance to offset new rays so they do not intersect with the originating_server geometry.
If the scale of your scene is too large, precision artifacts in the form of concentric circles may appear.
In That case, Increasing the ray can make epsilon These artifacts disappear.
In general, using high density meshes, the default "Ray Epsilon" of 0001 can be used. E.g. A "rayepsilon" of 0075 = 7.5cms.
Regards
Paride
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