I noticed other strange visual effects with your items...like picking them up will make them go weirdly to the right hand side of the screen...picking up or dropping these items with fast graphics kinda looks weird and out of line with other items.
Items from other mods with custom renderers seem to work properly.
As expected, it also breaks
this thing of mine (and Thaumcraft pedestals, and Blood Magic altar, probably about anything that renders items):
View attachment 23829
it's supposed to render nicely on the center and it actually does if you look at it from the opposite direction:
View attachment 23830
For some reason you are taking the player's view direction into account...it's kinda difficult to play well with that
especially when the perspective is supposed to be fixed like with TiC.