I nominated Pin-up Poster of Character as Medium Opt-In, some thoughts on equivalence (feel free to chime in)
This (https://images-na.ssl-images-amazon.com/images/I/81Qo5e6A7oL._AC_SY679_.jpg) is what I was thinking of, and I think it could be equivalent to about 3k? So maybe something like
Full figure sketch or detailed bust rendering = 1k Full figure sketch or detailed bust rendering + shading, or background details, or typefont = 2k Colored full figure or colored detailed bust rendering = 3k Colored full figure or colored detailed bust rendering + background or typefont = 4k (Example (https://previews.123rf.com/images/imogi/imogi1902/imogi190200027/116383922-retro-garage-repair-service-vintage-poster-with-pin-up-pretty-girl-in-mechanic-uniform-holding-wrenc.jpg)) Colored full figure or colored detailed bust rendering + background and typefont = 5k (Example (https://www.sportys.com/media/catalog/product/cache/3/image/9df78eab33525d08d6e5fb8d27136e95/1/7/17091_3.jpg))
If you think it should be handled differently, by all means!
Pin-up posters
This (https://images-na.ssl-images-amazon.com/images/I/81Qo5e6A7oL._AC_SY679_.jpg) is what I was thinking of, and I think it could be equivalent to about 3k? So maybe something like
Full figure sketch or detailed bust rendering = 1k
Full figure sketch or detailed bust rendering + shading, or background details, or typefont = 2k
Colored full figure or colored detailed bust rendering = 3k
Colored full figure or colored detailed bust rendering + background or typefont = 4k (Example (https://previews.123rf.com/images/imogi/imogi1902/imogi190200027/116383922-retro-garage-repair-service-vintage-poster-with-pin-up-pretty-girl-in-mechanic-uniform-holding-wrenc.jpg))
Colored full figure or colored detailed bust rendering + background and typefont = 5k (Example (https://www.sportys.com/media/catalog/product/cache/3/image/9df78eab33525d08d6e5fb8d27136e95/1/7/17091_3.jpg))
If you think it should be handled differently, by all means!