Steps to reproduce:

1. Create a base texture for frame called dye
2. Create a background called dye_red_background and their respective mcmeta
3. Create the frame mcmeta dye_red_frame.mcmeta
4. Create the permutattions on gui atlas, need to be called red_frame

Result: The tooltips show missing texture

Expected: Tooltip should be appear correctly, if maked manually it work correctly, the permutation maked by the gui atlas are correctly generated 

assets.zip

New custom tooltips dont support atlas permutation creation

Example pack on assets.zip