Companion

Global anisotropic filtering level for all GL_LINEAR textures. Defaults to 16x: the cost is paid only on textures whose minification/magnification ratio is high (oblique drone footage projected on terrain, sharply-tilted SurfaceImage tiles), exactly the cases where the sharpening is visible. Front-facing textures see no runtime difference. Drivers that don't support GL_TEXTURE_MAX_ANISOTROPY_EXT silently ignore the parameter.