Normal maps behave differently from other texture and image types, and as such downsamplign them with a Lanczos filter can lead to incorrect normals being calculated. Ideally most of the existing pipeline can be expanded to allow for a different filter type to be applied.
Normal maps behave differently from other texture and image types, and as such downsamplign them with a Lanczos filter can lead to incorrect normals being calculated. Ideally most of the existing pipeline can be expanded to allow for a different filter type to be applied.