Terrain Details dont receive shadows; tree branch textures gone insane

Sorry for putting two questions in one post, I always get into small problems which can be quickly solved with one click, but I never find them, so here again I ask you to help me!

The first is, the terrain's detail(the grass) dont receive shadows, which looks really weird when the terrain itself do receive them. I dont know what to change, or what and where...

The other is, when I create a tree, and put the branch texture on it, from bottom-to-top it starts good, then suddenly the texture elongates(google translate word) and that looks really weird too!

I have issues with my skybox too, but I will post that later, currently these are my very big problems!