I followed you step by step but for some reason when ever I render the image in the texture folder the one supposed to have a 512*512 image, has 96*96 part of the image the thumbnails folder renders fine though
New update - I am unsure if this means it has been fixed, though. https://projects.blender.org/blender/blender/commit/79da8921267da9cd6149e251a8f40d3302a65fda