Outline shader rendering in front of geometry that "extrudes" out of the main mesh

[hasty mountain]

To start I will add that this is one mesh (as in no submeshes), but even so I have the ZTest to be less so shouldn't it not render in front of any other part of the mesh?
For reference I'm using the inverted hull method for my outlines (inflating the mesh and rendering the back faces)

gist: https://gist.github.com/DarkTerraYT/790fe29cad622abcfbba30529bc918a8

[safe ice]

If you change the render face to back instead of front it should help.

also if the outline renders before the main mesh the z test wont do as you want (especially if its writing to depth too)

[hasty mountain]

Cull front does make the render face the back face, no? Since it doesn't render the front face

[safe ice]

Normally we render front faces, the inverse hull outline should then render back

[alpine parrot]

It's normal for outlines to appear over parts of the model with inverted hull. Those outlines are likely still infront of the other part of the model, hence ZTest Less passes (that only prevents geometry behind rendering ontop)

You can use stencils to prevent it. i.e. render regular model with "Ref 1, Comp Always, Pass Replace". Then render outline with "Ref 1, Comp NotEqual"

[hasty mountain]

Anywhere I can learn to use stencils?

[alpine parrot]

Google? https://www.ronja-tutorials.com/post/022-stencil-buffers/

[safe ice]

Ive done this fine without stencil use

I think the given example of a balloon should work fine without it but more complex models may need help.
If not targeting mobile platforms id go with a post effect outline instead

[hasty mountain]

ooh those look very nice

yeah I think I'll do those