I added the last prompt I used last but in truth this one has seen so many inpaintings that the original prompt is essentially irrelevant. If you wanna do something similar build the setting first then inpaint in your characters. That will get you the best results
Prompt
realistic, masterpiece, best quality, highres, 1girl, medium breasts, (((Pussy))), extremely detailed, (((RWBY))), (nipples), collarbone, (((ruby rose))), ((grey eyes)), (((black hair with bottom red highlights))), (paint dripping), nude, completely nude, pussy, (Photoshop), (squinting), closed mouth, (nsfw), (standing), armpits, (no shoes), (small paintbrush), facing easel, view from behind, ((painting a picture of weiss schnee))
White Rose Painting
I added the last prompt I used last but in truth this one has seen so many inpaintings that the original prompt is essentially irrelevant. If you wanna do something similar build the setting first then inpaint in your characters. That will get you the best results