I finally have a texture sheet!
Using my frame removal script, I got the right number of images and then popped them into a file node. I then setup a mosaic and a rop output node.
Unfortunately I had an odd issue where I couldn’t get more than 25 images on a sheet without getting odd artifacts and frames dissapearing. I’m not sure if this was something to do with the limitations of Houdini apprentice.
The final image was also low res and full of watermarks – at least its there though!