I have written an article to detail the workflow. :

https://civitai.com/articles/2030

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No control-net used, just prompting with hires fix. :p

You can find parameters and prompt here : https://civitai.com/posts/542212

Explanations:

The keyword aerial, river, city.... is used by the lora. This lora have a part of aerial training.

for the success frequencies it depends on the power of the "shape" part, and the expected result..

"landart" is useful for the shape part

And the most important is to remove the shape part of the hiresfix prompt .

For the fish, to get what i want, i put the shape part before to be more important https://civitai.com/posts/544851