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Hi Vlado,
I posted this before, a while ago: I keep noticing that rendering of matte surfaces considerably slows down a render when using the Light Cache. When using Light Cache for both primary and secondary GI, you really notice it. Try the following:
1: Create a large ground plane.
2: Give it a standard V-Ray material.
3: Set the plane's properties to be a matte surface with an alpha contribution of -1 and affect shadows and affect alpha switched on.
4: Create a direct light with V-Ray shadows on, create some arbitrary objects to cast shadows on the matte plane and put a Gradient Ramp map in the background map slot.
5: Render the scene using Light Cache for both primary and secondary GI in a fairly large resolution [1600 x 1600 or so] and check the difference when you switch off the matte properties of the ground plane and rerender.
Speaking of matte problems: when using Delone Triangulation, shadows do not seem to work on alpha surfaces.
Cheers,
Metin
I posted this before, a while ago: I keep noticing that rendering of matte surfaces considerably slows down a render when using the Light Cache. When using Light Cache for both primary and secondary GI, you really notice it. Try the following:
1: Create a large ground plane.
2: Give it a standard V-Ray material.
3: Set the plane's properties to be a matte surface with an alpha contribution of -1 and affect shadows and affect alpha switched on.
4: Create a direct light with V-Ray shadows on, create some arbitrary objects to cast shadows on the matte plane and put a Gradient Ramp map in the background map slot.
5: Render the scene using Light Cache for both primary and secondary GI in a fairly large resolution [1600 x 1600 or so] and check the difference when you switch off the matte properties of the ground plane and rerender.
Speaking of matte problems: when using Delone Triangulation, shadows do not seem to work on alpha surfaces.
Cheers,
Metin
