I guess I can make the chair self-illuminate 255,0,0 or something, but is there a more elegant solution?
After searching around, it sounds like the answer is “you can’t”. I was able to get it by applying a ray switcher to the chair with a material only in the ‘Refract override’ no diffuse, self-illum set to 1.0. Apply a flat black material to everything else in the scene, and then render just the glass. It’s best to save a scene state before doing all this.
If there is an easier way I’m all ears!
edit: set the self illumination color to 255,0,0 (or whatever) and turn off any post effects in the frame buffer.
So the issue is that you do not want the glass panel to occlude the chair, right?
I am afraid this is not possible currently, but it’s a critical feature and we are aware of that (it will be done).
Another thing you can try is using the render selected feature in Scene tab.
I need an easy way to grab a mask of the chair that respects the IOR value of seeing it through the glass.
Not possible at this time.
You can vote for it at https://forum.corona-renderer.com/ The most wanted feature?
“Refraction/Reflection working with masking render elements (CMasking_Mask,CTexmap, etc…)”