What are free tools for reduce atlases 3D models?

Free tools to reduce 3D model atlases (texture atlases) include Blender, GIMP, and TexturePacker Free Edition. Blender optimizes atlases via UV editing (reorganizing texture space) and baking. GIMP reduces file size through compression or resizing. TexturePacker Free Edition streamlines packing to cut empty space. For beginners, start with Blender’s “UV Unwrap” to clean texture layouts, then use GIMP’s “Scale Image” to lower resolution—this simple workflow balances quality and performance without complexity.