After some rather disconcerting exchanges with a number of people, I feel that it's necessary to say--
I only consider it stealing if you directly trace (which I do consider "sight-copying" to be the same thing) or recolor my work.
((And reposting without consent, but that's off-topic, here.))
If you create a picture (intentionally or not) that's SIMILAR to something I've done, I literally could not care less.
Because you're relying on your own skill and drawing something for yourself.
And I could never fault that.
Nobody owns ideas, and some of them are bound to be similar.
So, if you unintentionally draw something that's reminiscent of another piece by someone else, you shouldn't be afraid to post it.
((I've done this before. Worked really hard on a picture, posted it, and then at some point I get a message that says something like, "Oh, hey, this reminds me of so-and-so's picture." And I can only reply, "Oh yeah, it kind of does. Small world."))
Ideas are infectious, and there's not always a clear source.
And even intentionally, it's great to be inspired by things, so long as you're not copying it point-for-point.
((Though, if it's intentional it is polite to add a link to the piece that inspired you.))
It's also necessary to say at this point, that this is just my view of things as far as my own work goes.
Other artists have other opinions concerning their own, and I can't speak for them.
Thank you for your time.