Material Combiner is a Blender add-on designed to reduce draw calls in game engines by combining textures without quality loss. It also addresses the issue of UVs extending beyond 0-1 bounds.
Key features:
Combine Multiple Materials: Merge multiple materials, allowing the application of diffuse colors and selection of image and atlas sizes.
Multi-Combining: Add layers for each image combined into different atlases, enabling the generation of Normal maps, Specular maps, etc.
UV Packing: Pack UVs into selected scale bounds by splitting mesh faces, compatible with rigged models.