This mod applies to items being used by the ars nouveau mod, including in the enchanting apparatus and similar in-world item display blocks. This mod applying to the items makes them look strange and sometimes clip through the blocks. Would it be possible to add compatibility?

Sorry, but that is something I will not do on my end. They can disable the special rendering for their items by using added a method to their ItemEntities, not sure if that is possible in their case. But I cannot go through all the mods and disable certain items, that would not be good performance wise.