@jim said: ...has a nicer user interface... Well, at least simpler (with lots of easy to use presets) and easy to use, fast to set up... @jim said: Is it correct to say anything that can be done in Twilight can also be done in Kerkythea, but may be more work to get there? True. In fact, there are some features that are not present in Twilight but from Twilight, after setting everything up, you can easily export your model to Kerkythea and use those features there.

Now your card seems to be quite capable of handling the OpenGL needs of SU but probably the driver is not up-to-date. Try to update it and turn HW acceleration back on. Without it, SU does everything based on the software and CPU while with it, textures, shadows and whatnot can be rendered by the video system thus freeing some resources of the CPU to work on the geometry. Of course, with very simple models you would not experience too much difference but as model complexity increases and more and more (especially higher resolution) materials you use, it can slow down significantly without video support.