Art Library does not use the specified icon size, the default is 128x128 but it always starts at 64x64,
Also as the icons are always square can you remove the second number, (x)x(y) is pointless when x=y, just icon size (x)
Please disable the pop up preview when icon size is 256 as it just pops up the same size image and just gets in the way.
A suggestion… Could it be done so that the user could drop a local folder on the Art Library list so the folder is added to the list and opened in real time when selected or scanned initailly and a context menu option to update it? This would make library management far easier as users build up thier art collections.