Describe your problem
Currently the only real difference between textures and images is, that textures support multi-sampling and mip-map generation. Mip-maps are also supported by images, but generating mip-maps is only allowed for textures.

Describe your proposed solution
The differentiation between images and textures appears somewhat arbitrary. We should remove the ITexture interface and use the common IImage interface for both. This would make the API design much clearer.