hypercross
21fc1b29c1
Add an optional uvBounds to extrudeShape/extrudeShapeParts so UVs can be derived from a framing rectangle instead of the shape's bounding box, letting a traced silhouette align with its full image. The bottom face now uses the same planar xy UVs as the top face (no horizontal mirror), so the texture is consistent across front, back, and walls.