To upload a 3D model after exporting, first export it from your 3D software (e.g., Blender, Maya) in a format compatible with your target platform (like OBJ, FBX, or GLB), then use the platform’s upload tool to add the file.
Check format compatibility—most platforms list supported types (e.g., Sketchfab prefers GLB for self-contained assets, Unity works well with FBX). For formats needing separate files (like OBJ’s .mtl and textures), include all linked assets.
If uploads fail, try exporting with embedded textures (GLB) or simplifying geometry—this fixes issues from missing assets or large files.