Flat colors 3D models apply solid, uniform colors to surface polygons without shading, while voxel 3D models are made of 3D cube-like voxels that define both shape and color through individual blocks.
Flat colors focus on surface stylization—changing a color doesn’t alter the model’s structure, common in indie games or minimal animations. Voxels use volumetric blocks to build shape: editing a voxel directly modifies the model’s form, ideal for block-building games (e.g., Minecraft) or medical scans.
Choose flat colors for simple, stylized visuals; pick voxel models for block-based editing or volumetric applications.