Stable scene loading and func_luxe updates

maps/arena01_0_worldspawn.obj.assets/special/clip.material.lx

@@ -0,0 +1,7 @@
+material = {
+  basis = "func_luxe: basis/mesh.textured"
+  inputs = {
+    image.image = "textures/special/clip"
+    mesh.color = [1 1 1 1] // mesh.color
+  } // inputs
+} // material