This should work with a simple prompt like br41nr0t umbrella, but it didn't.

You'll need to give it a little help using some of the main training elements: exposed pink brain, viscous green fluid dripping, bulging red eyes, wet green/yellow surfaces, visible skeletal structure, a burnt orange background, and a surreal/biomechanical feel.

All images will have an orange background; you might be able to minimize this by adding an orange background to the negative, depending on the model you use.

painting (object), potted plant, indoors, in a living room these tags can also help to avoid having a boring and dull background orange background