Don't specifically know sorry, largest I can generate with my (windows pc) vram size is 512x1024. But just wanted to comment that SD is trained on 512x512 image

Don't specifically know sorry, largest I can generate with my (windows pc) vram size is 512x1024. But just wanted to comment that SD is trained on 512x512 images and runs iterations in a 512x512 window. This means anything larger than 512x512 tends to confuse it. For example 1024x1024 will have 4 non-overlapping windows and many overlapping windows. So if your prompt is "a cat wearing sunglasses", you may get 4 separate cats as the 512x512 windows have no knowledge of each other, and each window is trying to fulfill the goal. Even more likely you'll get some sort of eldrtich horror 16-legged cat being as the windows shuffle around. Sometimes it just works perfectly somehow, but 90% of the time the non native resolution really screws it up. I'd suggest generating 512x512 images and using a different AI to upscale them in most cases. However it does lead to some amazing fantasy landscape art as you get weird terrains and mountains shoved up against eachother in fantastic/magical ways.