Hi all, I am using 5.4 and am having trouble finding a way to render alpha transparency of glass.
I am using the movie render graph to render a vehicle with a holdout on a shadow-catcher plane. In post we comp together the scene and lay down the vehicle + shadow catcher on our own gradient background.
For this to work we need the glass of our vehicle to have alpha transparency so the HDRI of our render scene isnt visible through the glass windows. Unfortunately I cant seem to find a solution to this. Other software’s path tracers have pretty straight forward options to fix this issue.
The following image is an example of what I want/need:
I’d appreciate any help I can get. If its a 5.5 feature I’d be happy to download and test the latest version, but this seems like a pretty trivial path tracer feature for most other renderers so I’m suprised that UE doesnt have it implemented yet (I’m aware the PT has only been officially fully supported since the new 5.5).