Material Inspector
Find the textures that bloat your file
Every material in your model, heaviest first. In this example, a few 4096 px textures and one material's photoreal maps add up to 38 MB.
Check the big ones, click Compress, and pick a size: 1024 px, or 250 kB per image. Textures keep their real-world size, so nothing in the model shifts.
- Photoreal maps count too. Normal and roughness maps can weigh more than the texture itself, so they're in the total.
- Merge look-alikes, like "Oak natural" and "Oak natural copy", and remove the unused ones.
- Click a row to select everything painted with that material.