I do not know how to contact artist OP other than this thread, but if there is another way to contact OP on another individual committing plagiarism, please share.

An user named 3Dark on rule34 posted an old work I recognize on OP's old thread (https://rule34.paheal.net/post/view/2311301) (replace hxxp with http).

Also identified some other 3Dark's posts by Misery Alley and another Gurochan artist's animation from 3D CGI section.

I thought I had to bring this up because 3Dark has gradually been increasing post frequency. No doubt other works I could not identify are not 3Dark's work.