Trees/Leaves Problems

Hello, on start sorry for my bad english and i hope that you will understand me. And sorry if some of my question was here, but i tried to find it.

  1. Sometimes When i change a size of my tree disproportionately, leaves are really light.

I tried to change a color in material and turn off a light. It’s like leaves are a light :expressionless:

  1. With many models of trees i have a problem like this. I tried many shaders and i don’t know what is a problem with. Have you guys some idea? And how you can see first problem is here too.

Lighting problems when scaling are normally due to the mesh normals/tangents used in lighting calculations being scaled. If you want to support scaling properly in your shader you should re-normalize these vectors before they go into the lighting calculation.

yy, sorry but i don’t get it, can you give me some site when i can understand it?