I made a bunch of different seadweller/merperson earfins, and then I made some bioluminescent/biolflourescent versions because I love that headcanon!
These are all the characters I designed for Spera: Ascension of the Starless Vol 1 (now available in stores: Amazon/bookstores etc). Enjoy!
Basically I just shade with a very dark color, and apply a small gradient of some bright saturated color along the borders to emulate diffused light.
Varying light angles and intensity for mood! I love back light HAHAHa–
Can work it in other hues, too! And I guess here’s a quick walk through of smth similar to that pic you were talkin about, with windows of strong light.
Draw the projected light over the subject
Add shadows on the character. Moved the light going past the character hitting the floor.
Overlay the bleeding light!
I use a lot of this kinda thing in finished pics too– here’s a recent example!
(This image was a collaboration– Sketched by labonbull and linearted by 73oss)
Sketches that came with the Magi DVD vol.7 that depict the main three going on a journey. Here’s Ohtaka’s comment:
“These are sketches that I did before the serialization. I drew them while looking at pictures of the Mogao Caves in China. At first, Magi was going to be a manga that revolves more around conquering dungeons, and so I did a lot of sketches like these.”