OK, another suggestion then. Almost every porn game depicts sex with both parties totally nude. I find it much more sexy to go at it e.g. doggy style while her panties are a bit down her thighs instead of being totally nude. Same for missionary or while spooning. Clothes hinder movement but since you aren't doing animation it shouldn't be a problem. For the cherry on top, be sure to alternate closeups of the pounding with her making faces...
BTW, my favorite missionary variation is with her legs on his shoulders, this is rarely seen on games but again looks hot with panties there somewhere.
Just more food for thought