In item frames definitely
In hand maybe would be cool

Talking through this in slack + some other notes:

• Render in-hand. We could use something like shift+scroll to go to the next page.
• Use RenderItemInFrameEvent to allow fancy rendering on item frames.

VERY interesting. Thanks for deploy this @SquidDev .

I imagine using this for make like newspapers glued on walls, or wanted posters.

Added in fd10ed6. There's probably more to come as the PR is updated, but let's get it here first.