Well this is new– Me actually posting to my own blog. XD
Ok, so a while back I and a good friend who remains anonymous were playing with texture painting. Well he was, I was just a crack-pot tinkering with what he was discovering. BUT…I did get something new out of it that I figured out: Seamless texture painting. Let’s get into it.
First we need a victim-er, image to make seamless. I shamelessly chose a grass photo on a landscaping site that I simply screen shotted to 512×512 px for my convenience. (You can use any size image, but square is optimal.) You will be editing this image directly–so save a copy if you need to. You can also SKIP this step if you want to paint something from your own awesome brain. You can then save that image at your desired size/format.
Now comes the process:
(Above) We will take a brand spanking new plane, and loop cut it like so. What we want is 9 quads/faces.
And then we will NOT unwrap the faces. Instead Select all faces and type “u” for unwrap, and then click “Reset”.
And now you should have this ^^.
(Above) Simple texture mapping. Use UV coords.
And above again, you can see that I have made the material “Shadless” and have also put the viewport into textured view, and have enabled GLSL.
Now you can go into “Texture Paint” mode and hit it!! Remember this though– you will only effectively paint seamlessly by painting on the CENTER quad on your mesh. Painting in the UV editor will not work. If you REALLY screw up–you can use the handy “Reload Image” command!!
I find that the clone tool works great for trying to blend the edges of the tiles. NOTE: The 3D cursor is where the source of the clone will come from!! So be sure to move it around appropriately. I tried various strengths and curves on the brush. Above you can see “my” optimal settings. I did not take extreme amounts of care, but you can see above that at least the hard edges are well hidden, this can be enough for some. The big issue with this particular image is that it is a picture of a tilted plane of grass with varying luminosity–not terribly optimal for very uniform seamless tiles, but good enough for this demonstration. Below is the original image I came up with when I discovered this “easter egg”.
Happy Blending, Happy Texturing!