Never Found a good workflow for this.

Creates a Transition between image xy borders to make every texture tileable.

Offsets base texture image by 1/2 , creates a cross mask that is inpainted by flux fill.

This is experimental and doesnt work with some textures which are not homogenous enough.

Please feel free to improve. Values have to be adapted to texture. Fine textures need a small mask width and vice versa....

Upscaling ist probaly better done with flux dev , as flux fill isnt the best model for that...

Standard size is 1024*1024 upscaled 2x . Edit if you like.

VRam needed about 16gb i guess. Feel free to use a quantized version or gguf flux fill if you dont have that much vram....

Dont complain , if you dont have all the nodes. You will have to install them :)