how to modify terrain heights at runtime without changing asset file

i need to modify the terrain at runtime and its working using terrainData.SetHeightsDelayLOD()
terrainData.SetHeights() is way to slow

but it changes the file in the assets folder which is not what i want and i expect slows things down unnecessarily.

is there no way to use terrain (vs. mesh) with in memory modifications only

thx

 

You need to Instantiate a copy of the TerrainData and use that copy, otherwise you will modify what is on disk.

If you want to see an example of this, check out my terrain deformation example in my MakeGeo project. Look for the

TerrainDamager

scene.

MakeGeo is presently hosted at these locations:

https://bitbucket.org/kurtdekker/makegeo

https://github.com/kurtdekker/makegeo

https://gitlab.com/kurtdekker/makegeo

https://sourceforge.net/p/makegeo

 

thanks, that's great, actually instantiate doesn't work for terrain so he wrote TerrainDataCloner which is the key to making it work

 

i got it working but i have a high res height map, 4097x4097, so i just take a 32x32 patch and modify that and use terrainData.SetHeightsDelayLOD() on the patch, not the whole thing and it works great, and fast. i need it fast because i'm deforming the mesh in real time.

problem is when i use the splatmaps, and use TerrainData.SetAlphamaps

my terrain texture is 2048x2048 and if i set alpha maps on the whole splatmap, it grinds to a halt. so i tried just a patch and its faster but still way too slow.

i wonder is there is a faster way to change the texture on terrain at runtime