Hey Ive found a bug where the iron block doesnt appear as shiny and as much detailed as it should, I have a texture pack called ''Vanilla RTX'' made by Nicinator that I downloaded from Mcpedl.com and the iron block, Diamond Block, Emerald Block, Gold Block and Slime block dont have as much detail as they should. I dont know if this is cause of 1.16.3 But im not sure.