Multiblock selection missing some surfaces
To reproduce:
- Use built-in server (might affect c/s, too)
- Load g1s1
- Render surface with edges
- Try to select points on any face facing the camera.
Points are selectable on the edges and sides of the model, but not from the face.
Inspecting the selection buffers with apitrace shows that the faces are completely blank (I can send an image if requested, but only within kitware).