Resolution 512?

[art926]

I'm new to this, sorry if I ask something silly. But when I try to use this sample.py script and increase the default resolution from 256 to 512 (for both, width and height), I'm getting results like this for "one red apple.":

so, it looks like it generates a few images (4?) that it merges into one. It happens for all output images. If I keep the default 256 resolution I get something much more expected:

I'm using a Colab version of this, btw, that I found somewhere online, maybe it's slightly outdated...

[Jack000]

so when you increase the width/height like this, the left side of the image doesn't know what the right side is doing, they both start making apples and weird things can happen. It can be a good way to make a complicated scene with a lot of stuff going on, but will not work great for single subject images like this.

the native resolution is 256x256, so if you need only one apple I suggest using that resolution for now. If/when I train an upscaler that would help fix this issue.

[art926]

"the native resolution is 256x256" - what network/component has this limitation?