thanks Rojart, there are so many things I could include (and to learn first)...
what I plan first are: rewritten shade-c shaders to SM3.0 (today nearly finished), replacing shade-c shadowmapping with exponential shadowmapping (if I can do it at all somehow...), random terrain generation and texturing (probably the TUST library will help a lot), and river bed and mesh creation. (I simply need them for my game)
and a general patfhfinder would be also great (my one is really only for rts), maybe Peragro or a self made.
I have only little experience with physx, but I saw such an editor in other engines.