I made a resource pack that gives stacked items a different texture based on the amount in the stack using Optifine features! : r/Minecraft
Dasher´s Stacked Items Resource Pack 1.16 y 1.15 - Minecraft
Recipe Plus Data Pack 1.13.2 (Better Recipes, Stackable Items) - 9Minecraft.Net
Minecraft] I made a resource pack that gives stacked items a different texture based on the amount in the stack using Optifine features! - Album on Imgur