Getting the terrain texture from under an object

Unity Engine
1

Hello, I’ve searched almost everywhere I can think of for this but can’t find anything.

I’m looking for a script snippet that can detect a location on the terrain object and send back the texture from that location. I’m attempting to build better physics for a vehicle script and well, mud has different properties than grass. Is this possible? Any help is very appreciated.

2

First you will need to expose the splatmaps to your script

 Texture2D splatmap;

you will need to attach this manually in the editor.

then you need to get a ratio between the splatmap size and the terrain size.

Vector2 ratio = new Vector2(splatmap.size.x/terrain.x,splatmap.size.y/terrain.z);

once you have done this you can read the the splat map color using a position in worldspace
you can :

Color posColor = splatmap.GetPixel( (int)(transform.x*ratio.x), (int)(transform.z*ratio.y));

cross reference this with the textures used for you terrain to return the texture

if(posColor==Color.red) mysurf = "mud";
if(posColor==Color.green) mysurf = "grass";
if(posColor==Color.blue) mysurf = "sand";
if(posColor==Color.black) mysurf = "rock";
3

Hi,

this sounds very interessting,
even when it not directly pointing to the question. is there a possibility to change now on runtime the texture of the terrain under that object?

4

Sure, but only with a texture already loaded into the terrainData
Just paint the the splat map
red, green, blue, or blk and alpha using SetPixel
make sure rgb has alpha=0 i think