Redshift Glass Shows up as black

[MaverickMongoose]

Hi Dr Sassi, I have 4 glass objects in my scene, 2 render fine, but the other 2 objects which are very thin just render black.

Is there a way to render super thin glass objects?

In Octane I think I needed to adjust the ray epsilon to fix similar problems, not sure what to do in Redshift though.

Or could it just be dodgy geometry? It seems clean to me.

Or maybe something in the material? The same material works on the other objects.

Thanks again

https://we.tl/t-bsiqOLxhcc

[Dr. Sassi]

Hi MaverickMongoose,

Thank you for the files.

The black glass shows up based on wrong Normals, which is an easy fix.
Select the object and use the Polygon mode for this. With the "mouse" in the editor view, select all (cmd + a)
Then go to Main Menu> Mesh> Normals> Reverse Normals—one time.

Repeat this for the other object.

(This works here as all Normals are "wrong" in the same way; otherwise, use the Align Normals first. This function uses the first polygon as orientation; if that isn't working directly, use the process from above afterward.)

Here is the result when I do it this way.

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All the best

[MaverickMongoose]

doh,I swear I tried that and it didn't work, maybe I had the wrong thing selected.

Works great now, thanks again!

[Dr. Sassi]

Great that is works for you, MaverickMongoose.

My best wishes