How to get rid of terrain splatmap texture seams?

I’m trying to manually texture a terrain with a grid of images using a splatmap.
The images are exactly 256 x 256 and I seem to have everything working fine except for the edges. I’ve checked images in PS and they line up nicely, but in engine there are obvious seams (image below). I’ve turned off mipmaps on the textures, and have tried to set the textures wrap mode to clamp, but none of that has fixed my issue. Any ideas? Or is there another way I can tile a terrain with images?

Thanks for any help!!

I don’t know if that’s possible, but from the image, it looks as though you have the two textures overlapping along that strip. You could try making the images deliberately overlap a little and then allow for that in the splatmap.

Alternatively there’s nothing stopping you from making multiple terrain tiles, one image for each. You’ll need to use Terrain.SetNeighbors to make sure the normals line up at the edges, so you don’t get lighting seams.