This chapter explains exactly why I prefer Trails in the Sky to Trails of Cold Steel. If you don't do a good job with your HD 3D models, they are gonna appear lacking.
@BlueLightning I agree. In Sky you have Bestelle and other characters with a lot of expressions during dialogue while in Cold Steel you have a 3D portrait that just talks with zero expressions in their face
Realistically drawn hentai can also vary. It all depends on the mindset of what to portray and what to omit. Pixel-art porn is great deal of fun due to usually being pretty creative by the way.