Thank you for your answer. I don't know exactly how many 4k maps are in that scene. With other scenes, I hided all of objects which wasn't in the camera lens. But for this room it's a block and I can't do anything. Have you some tips or links which explain how to downsize surface maps? without scene optimizer.
For my personnal opinion, I prefer photorealism. You are terribly right with the fact that it can be boring but it can also be more attractive if it's well done. I began with DAZ 1 month ago and I'm still looking my style. I saw lots of render in this site and in DeviantArt and it's really better (for me) when we are questionning on some pics if it was real or not. Another big part is environment, staging, poses, camera's position, artistic direction and yes, some non real pics are lots of better than if it was realist.
I don't necessary want to show pussy or nipples all the times. I want sexy pics but not always nude pics. I made others in this room, I will add them. And there is one nude

but not fantasy pics.
Thanks for your feedback