What is the ruling on working in the field of lingerie, using images of naked foreign models, then blurring their bodies with a beige color, knowing that these images are displayed to both genders, and what is the ruling on the money earned from this work?

If you are posting pictures of immodestly dressed or semi-naked women, this is impermissible, regardless of whether you changed the skin tone or not. As for the money earned from selling clothes designed for immodest display, the basic ruling is that it is permissible, unless it is sold to those who wear them in front of men who are not their husbands; in that case, the sale and the money earned from it become forbidden.