You're welcome ! And I watched the first episode of your webtoon and understood why you said you felt the inside of the comic didn't reflect the outside, the cover. I think there is no comparison to make, as you have decided to use 3d renderings for your sets.
It surprised me, and embarrassed me a lot. But given your subscriber ratio I guess there are some that don't bother. So not being a specialist in media mixing, especially mixing 2d with 3d, I have no solution to offer you to make everything more harmonious. So, I can only tell you to continue with what makes it easier for you the most, or possibly integrate this 3d in the cover, in small quantities, even this I find that your drawings are much better.
And also, just out of curiosity, do you have problems with the perspective or this choice of 3d was a need for speed? And also, are you the artist who modeled, textured and rendered these scenes?