Hi! You can disable the seamless filter with the checkboxes under the sliders in the window! If you have them disabled, none of the settings should work! (maybe except the lighting one, but you can just set it to 0).
You can't redo the custom resizing thing yet! I want to add that, since it would be a huge time saver. I was just deleting the rippers and spawning new ones if I broke something lol ><
I have no idea why it would resize incorrectly tbh... Maybe the ripper moved, or values were missed? but tbh I haven't encountered that yet. I'll have to look into it!
The white box was previously a debugging thing for me, but ended up being quite useful. I've often used to add something to the atlas, after I've exported it and it broke often because it changed the atlas dimensions. If you are talking about the whitebox around _only_ the resized images, it's probably an another bug :C It was supposed to display which texture you are holding and I wanted it to show how it looked unresized, but it was bugging a lot and I gave up on it before the release x3 I'll fix it in the near future!