But just look at how the quality of VNs (render-wise) has soared too bro. HD renders demand more space.
The GB games WERE Full HD, and use the same rendering software as the new ones. There's no reason for it. Tell me how the renders in your VN are better than the ones for "We Were Just Kids" or "Eternum"?
Edit: After taking another look at your renders, I can't see where you think yours are even particularly good. There are a lot of things I had to ignore to enjoy this story at all, like how clothing is always tucked up under the boobs, like that doesn't make a lick of sense, and the terribly unnatural poses at times.