Negative Prompting Misbehaving

[todd-elvers]

Users have noticed some strange behavior with negative prompting causing the results to wander significantly from the positive prompt.

The following is a text-to-image request with clip guidance disabled, cfg_scale of 7, steps of 50, and a fixed seed.

{
  "height": 512,
  "width": 512,
  "seed": 12345678,
  "text_prompts": [
    {
      "text": "cat",
      "weight": 1
    },
    {
      "text": "kitsch, ugly, boring, bad anatomy, oversaturated, grain, low-res, deformed, blurry",
      "weight": -1
    }
  ]
}

yields:

If we alter the weight of the negative prompt and choose anything between -0.06 and -1 we'll get the same image as above.

However if use a negative weight of -0.05 we get a slightly different image:

Using -0.01 causes more changes in the image:

And finally, using something like -0.001 results in a dramatically different image:

We will update this issue when we have more information as to why this is occurring or how users can mitigate it.

[dubtor]

confirming that negative prompts behave "broken", up to a point where i have to use only positive prompts at this point. hope this will be fixed soon.

[davidgut]

Any news regarding this? The issue seems to be unsolved still.