The Unreal engine uses a completely different technology. RedPhantom is right, it also depends on the capabilities of the machine you are using. Here's an example: My killer carpet...:) It takes about 30 seconds to load before Poser 13 shows it on the screen or you can move something. Even when it's loaded, the image in Poser stutters when rotating, moving, etc. And I'm working with an RTX 4070 Ti. Ok, with a few million polygons that's just the way it is. Rendering the killer carpet is no problem for Poser 13. As described above, correct the bounces a bit upwards, especially with multiple reflections, this is a must, then it should work.