Hi, I made a new navigation abstraction for the gemwindow. it is called advcam (advanced camera) and by connecting it to your gemwin you can use alt key (and additionally shift key) plus a 3 button(!) mouse to change the view. it has two modes: one is similar to 3d modelling programs, where you can look at the world from different camerapositions, and the other mode is like an ego shooter. I could not test is on windows or linux, so there might be problems with keyboard layouts. I use hid and gemmouse for navigation. please send feedback! oh, you can find it at http://parasitaere-kapazitaeten.net/Pd/advcam marius.