Cycles - groundplane and transparency

Rhino
1

Hi @nathanletwory
Inspired by Jørgen @Holo complaint on the OpenGL transparent materials, here’s something I’ve been meaning to report for a while. If the groundplane is visible through a transparent material, it looks as if the groundplane material is overridden by a default material. Is this something that can be changed/tuned up, or does it have to do with the weakness of the shadow catcher material - I seem to remember you indicating that it’s not really a “proper” Cycles solution? Attached is the same view with the groundplane as the default plaster material and the “shadow only” material. Notice how the groundplane - when seen through the glass - is the same on both screen grabs.

default material
default material1700×588 121 KB
shadow only
shadow only1729×578 90.6 KB

TIA, Jakob

2

It is a shortcoming in the shadow catcher feature of Cycles. This issue is still not solved upstream properly. For instance in reflections you’ll still get the ground plane as well.

kuva
kuva642×538 31.1 KB

In the future I’ll likely tackle, if not even rewrite the current shadow catching algorithm, but it is not top priority at the moment.

1 Like