It seems to work, so let it be called alpha version

It seems to work properly, so you can take a risk and try it out. It's still in an early stage and is definitely not tested, but it can be useful. I know there is Tilesetter (though I did not when started), but it's not a solution to every problem.

In TilePipe input images are predefined by preset - if you have a preset for 4 input tiles, then you need to put them in proper order (like in example) in your graphical editor. The tile size is computed automatically, and the output is scaled if you set it up. To have the randomization you just compile several input images under each other and the random tile will be taken while generating.

The output position is also defined by a template image, the default blob is from Godot tutorial.

For now it only generate single-blob tilesets, but it can be added later. Also I plan to add normal maps and flow maps generation (that's why there is seed in the randomization - to get the same tileset to match normal maps).

If I ever add support of exporters to Tiled, Unity, etc., they probably will be premium features, but Godot export will stay free.

If you are interested, it started from this https://www.reddit.com/r/Sailing_west/comments/j7sayc/while_working_on_world_generation_i_made_this/