All demos were opened with Godot 4.2.1, with the mesh format
upgraded for 3D demos.
The 3D antialiasing demo now uses Extra Cull Margin on the last
object to prevent it from disappearing too early when the camera
rotates (due to its use of shader-based animation).
Made the usual changes to the project settings and tested to see if
everything works.
Everything works fine!
Small fixes
Changed to Vulkan Mobile.
Changed viewport size.
