b.com/integeruser/jgltut for info, updates and license terms.
Part IV. Texturing Chapter 16. Gamma and Textures http://www.arcsynthesis.org/gltut/Texturing/Tutorial%2016.html
A - toggle gamma correction. G - switch to a texture who's mipmaps were properly generated. SPACE - press A and G keys. Y - toggle between plane/corridor mesh. P - toggle pausing. 1,2 - select linear mipmap filtering and anisotropic filtering (using the maximum possible anisotropy).
@author integeruser