texture_scope

Texture scope is used to display the texture object in the viewport. This is done by generating geometry where each image is a points object, and each point in those geometries represents a pixel. This allows zooming in on an image and seeing the data, without interpolation.

In the case of UDIM-style texture atlases, images are arranged in the extended UV space.

match_aspect means that for non-square images, the aspect ratio will match the image. For example, if an image has a resolution of 200x300, if match_aspect is enabled, the image will display taller than it is wide, and will be proportional to the image. If match_aspect is disabled, the image will be displayed square, matching the UV space, and will appear stretched or squashed.