Changing back face to front face in vertex shader

hi everyone,

i’m a beginner in glsl.
i’m searching for a way to make the back faces into front faces in the vertex shader. i’ve googled it but didn’t find what i was looking for.
i am thankful for any kind of help!

There’s no way to do this. Particularly since a vertex shader operates on vertices, not triangles.

Even a geometry shader doesn’t get to set the facing of a triangle.

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