Transparent objects cast too few shadows in Rhino. A way to show the caustics would also be very nice.
But how can I give the glass in the example more shadow without making it cloudy or dark? It “floats” too much on the table. There are shadows, as you can see in the non-transparent objects.
Who knows what to do? A workaround?
I was able to achieve an improvement by reducing the roughness of the table. If anyone has any additional tips, please let me know.
Are you encountering this problem?
I suspect your second image is merely showing reflection, not shadows. But I’m not sure.
@nathanletwory would be the one to ask how to handle this-
Yes, the second picture of mine just shows more reflection. Yes, the representation of how glass casts shadows is indeed unsatisfactory.
The current Cycles implementation in Rhino doesn’t do caustics, so that’s out of the question.
And shadows are done via “colored shadows”. Meaning the transmissive material is being switched for a transparent material to do that. Since default glass has full white you don’t see this. Set a darker color and you’ll start seeing shadows. Here a side-by-side comparison of default glass and one with gray as the color.
edit: here with a color to highlight better the colored shadow on the table
A cheat would be to render the glass with a solid material and create a shadow pass then composite it later with the actual scene.
I haven’t had Rhino that long. Could you perhaps tell me where I can find the settings?
make two identical renders,
one with the glass transparent, another with the glass in a solid color or (less transparent ) so that the shadow is stronger.
then blend them together in your favorite photo editing tool like photoshop or other.
