Why does my flat colors 3D model weird shading in textures?

When flat-color 3D models have weird shading, it’s usually from incorrect vertex normals, conflicting lighting, or materials not set to true flatness. - **Vertex normals**: These tell the renderer how light hits surfaces—if they’re smoothed (not hard-edged) for flat faces, you’ll get uneven color gradients. - **Lighting/material mismatch**: Directional or other lights can add unwanted shading if your material isn’t using an unlit/shadeless shader (which ignores light). To fix it, reset normals to "face" mode in your 3D software and switch the material to a "flat" or "unlit" shader—this ensures consistent, even colors.