terrain paint

Unity Engine
1

hello, so i’m a beginner and i have a probleme with the terrain paint, the texture ( from standard assets) goes verticaly when i try to apply to my terrain and i can’t find where or how i can solve this ( at the start of my project no probleme but now i need to adjust and it does this ) unity — Postimages

sorry for my approximative english, thank you for your response

2

That part of the Terrain inspector is for painting Detail meshes and gras billboards.
If you like to paint the ground color / Material you have to use the Tab on the left.6076191--659061--upload_2020-7-10_17-1-24.png