About this document
It can be common for different material texture channels to have different-sized textures to optimize the texture pool or file size (e.g. a 4k diffuse and 2k roughness texture).
'Force Default Texture Size', which is located in the 'Texture Output' window, bakes all input textures into the selected output texture size.
When disabling this setting, InstaLOD evaluates the input texture size and outputs each channel in its original size.
Please Note: Disabling "Force Default Texture Size" is not suited for operations such as Material Merging as the output texture size for all channels will be determined by the largest texture from the different input materials.