Hello! I have that problem with hydrocraft and PZ x1 textures setting, when hydrocraft objects are displayed at x2 scale.
I can convert textures to 50% scale so their display size is normal. Tested some. Things are normal size, but there is a certain issue.
Take Item_HCBarrelblue.png(65x100) and Item_HCBarrelbluecorpse.png(35x59), the latter converted to 50% looks ugly.
Well, those texture sizes are different(roughly x2), but their display size is equal, so display size doesn't depend on the texture size, which leads me to the conclusion, that there should be some option in hydrocraft files, that controls that display size or, maybe, some mapping... Which I could not find.
Any clues?