How do you outline invisible 3D meshes?

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Godot Version

Godot v4.3

Question

This video https://www.youtube.com/watch?v=CG0TMH8D8kY is very informative and much appreciated but what if the thing being outlined is completely transparent? Then it’d just be a glowing silhouette. Don’t want that. Is there anything that would work for this

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Can you explain a bit more what you want to do?

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I want a glowing outline around a 3D mesh that is completely invisible. I want the outline to specifically not be seen through the mesh

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In the absence of a real stencil buffer, you can render your mesh in a separate viewport and use that to mask out the outline mesh

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