So, hi.
Today, I tryed to retexture bundle with a specific name. However, I can't find a method that works on both CITResewn AND Optifine (since its supossed to be added onto my SMP, I need it to be compatible with both) I hope I can find out whats wrong, I just spent my entire afternoon working on this

The method working on CITResewn
type=item
items=minecraft:bundle
model.bundle=item/tcg_emerald_open
model.bundle_filled=item/tcg_emerald
nbt.display.Name=ipattern:Om Nom Lands TCG: Emerald Booster Pack

And this one is working on optifine
type=item
items=minecraft:bundle
texture=tcg_booster_emerald
nbt.display.Name=ipattern:*Om Nom Lands TCG: Emerald Booster Pack*
nbt.Items=exists:true

type=item
items=minecraft:bundle
texture=tcg_booster_emerald_open
nbt.display.Name=ipattern:*Om Nom Lands TCG: Emerald Booster Pack*

(Also, I am quite new to CIT, so there is a high chance I am missing something)

The official way would be to use texture.bundle_filled. That not working on optifine is an optifine issue.

If however you want to use the latter approach, the exists: check is not in cit resewn yet. Follow issue #204 to know what happens with it.