This picture is a derivate work of a CC-BY (https://creativecommons.org/licenses/by/4.0/) atwork from David Revoy (http://davidrevoy.com), you can find the original artwork here : https://www.peppercarrot.com/en/static6/sources&page=inks#gigantic
The change made to the original picture is the addition of colours.

This derivate work use the Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/).
You may share and adapt this work (both .jpg and .kra), but you must credit both David Revoy (http://davidrevoy.com) and myself (https://mastodon.art/@Bhoren) as well as linking to the source (http://bhoren.the-tin-locust.com/David_Revoy/gigantic/).