[Request for how to have a Block Render an Item in the world.]

Example's: Minecraft Item Frames, Item pipes from build craft, Tinkers Construct Crafting Station, and Iron chests Crystal Chest, are some examples.

I would like to use this feature in a bunch of different ways and contemplating once figuring it out making a few procedures and plugins to help others.

Thank you so much for sharing your knowledge and helping me learn. TeuFox

[[1.16.4] Can I get a basic gui/screen tutorial up in here or at least some documentation?]

TheGreyGhost thank you! As I said anything helps, looking at someone's code is one of the best ways to learn new things thank you! 

[[1.16.4] Can I get a basic gui/screen tutorial up in here or at least some documentation?]

I have been looking all night and struggling to put together a working gui for making minigames in Minecraft to get ores. anything would help.