Affects Version/s: 1.15.2, 20w16a, 20w46a, 20w49a, 21w17a
Fix Version/s: None
Category:Block states, Textures and models
This affects resource packs that provide a custom model for different rail blocks. To visualize culling I've made a small helper indicator, where a letter disappears if block is culling in this direction.
Straight rail blocks cull with full blocks but not with other rails:
Same with ascending rails and corner rails:
This happens with all 4 types of rails. Additionally, rails should also cull with matching sides of different types:
Below is an example of my rail model whose endings disappear faced against full blocks but not against each other:
One important note is only the corresponding sides should cull, as highlighted here in green. Sides marked with red shouldn't disappear.
I've also attached a resource pack that adds the culling indicator I used to make these screenshots (It's the same I used to report MC-178889 hence it affects chain and iron bars as well).