How do X-Planes resolution settings affect VRAM and frame rate?
Thanks to Ben Supnik: In X-Plane every texture is downsampled from its on disk size based on the resolution settings: • For object, aircraft, autogen, and most non-special-case non-terrain textures, the size of the texture is divided by two for each resolution size below “very high”. (So high = divide by two, normal = divide by four, etc.) • For terrain textures, the textures size is divided by two for every size below “extreme”. • Some textures such as the aircraft panel markings (both blend and test) and the main UI texture as well as a few others are never made smaller because they would not function properly.