All right, lets do this one last time...
Some simple sketches - basicly a mix of a colored spots - can really shift model's attention to the aspect you want it to see and bring forth some less obvious model's capabilities.
1. Original crude sketch. It's a couple of strokes made in PaintDotNet. The size of original can be 2-4 times smaller than common full-size that the model can operate.
2. A bunch of 2x-upscales made using IMG2IMG at different Denoising Strength (DS) setting levels. For XL-models good DS at this stage is .65-0.85. You can make very simple prompt if you make more detailed painting. Prompt for this image contains about 2 lines like "futuristic cityscape, vivid colors" etc.
3. Another simple drawing over chosen at first stage image using again PaintDotNet. Firstly I downscale pic 2-4 times, than draw.
4. And than upscale again with lower DS than at first stage - usually 0.55-0.65.
You can iterate this any number of times you want, till you see what you intended.
Resulting image after finishing 2x upscale.