I'm relatively new to making mods, I've figured out the basic stuff about making blocks and items...

But there's this one thing i can't seem to figure out for some reason, and there's 0 tutorials on youtube on how to do it.

Foliage on blocks has me stumped, like how leaves and grass do.

I've made quite a few blocks, that rotate, have different bounding boxes, collision boxes, models n stuff,

but i would like a little more walk through with this to understand it more. (and maybe it'll help others understand too)

Minecraft does that by registering IBlockColors in net.minecraft.client.renderer.color.BlockColors. But that alone isn't enough - your block model must have a "tintindex" for relevant faces, for example look at assets/minecraft/models/block/leaves.json.