How to export wireframe from blender to godot
TL;DR GLTF Export → Data → Mesh → Loose Edges
00:01 1. Prep wireframe meshes
00:03 2. Check GLTF Export → Data → Mesh → Loose Edges
00:09 3. Export & use in godot
00:21 Viewport selection note
Just a single gltf export flag, yet I didn't even know this existed - and think many still will considering search results.
Not sure if this works on all game engines but one thing sure it works flawlessly in godot.
I personally think having extra wireframe mesh is more performant than having complex fragment shader with wireframe render mode that discard pixels of unwanted edge using vertex indices or else. Each GPU cores are already stupid enough for extra branches!
Even for memory cost - it'd only add mere fraction of the original mesh, because majority of mesh binary data is tri info + UV tri info and it's gone. (unless VBO unbind/binding cost is too high maybe...?)