Minecraft 1.20 added Display Entities that are able to display blocks, items or text with various transformations (translate, rotate or scale) applied to them. The following variations exist:

• minecraft:block_display - renders a block
• minecraft:text_display - renders text
• minecraft:item_display - renders an item

These are really useful for builders to create their own models in vanilla without the need to install custom resource packs.
Tools such as bdstudio simplify this process, which leads to an increasing adaptation by servers and mapmakers.

Chunky should at least support rendering block display entities so that buildings that were build using block displays are rendered correctly. As of now these blocks are simply missing, which may lead to some strangely looking results.

#1563 already mentioned this but was closed as completed without adding support for block displays.