Lukas Stockner
31ac2e292e
The code checked for the presence of more than one tile before substituting the tile number into the filename, so if a one-tile UDIM was used (or all but one tile were culled), the substitution was skipped and as a result the file was not found. With this change, the code explicitly tracks whether substitution is required, avoiding this problem. This also fixes another problem: The Environment texture never does substitution since it doesn't support UDIMs, but before the syncing code still inserted the placeholder into the filename if the user selected a tiled background image.