Move the card sprite repeat/offset out of per-card texture clones and
into a uniform injected into the material shader. Cards now share the
deck sheet (one GPU upload), the shader, and the geometry, with only
per-card material uniforms differing, so navigating a deck no longer
re-uploads the sheet on every step.
Model ColorDiffuse in shared types and multiply each viewer's material color by the per-object tint, including textured faces and loaded custom models.
Model TTSObjectTransform in shared types and convert each object's position, rotation, and scale into three.js placement, with per-class base-size corrections and a lay-flat rotation for extruded meshes.
Add a /mod/:id/setup page that lays out every renderable object in a single shared scene. Export object-facing mesh wrappers from the viewers and share geometry and materials across objects via module-level caches.
hypercross