@ratchet: Thanx for the hints. I forgot, that particle explosion (with cubes) is planed

May be my collision explantion was not clear enough. Of cause - collision should work like described. I just don`t know how to organize all this different cases.

I would like to use Shader, but I have to wait, until I have enough money for the commercial edition.

@Richi007: Thanks - I just took a look to the manual - and guess I have to read a lot, before I continue I haven`t known about groups before - so I have set an own TYPE-skill to every ENTITY to put them into groups - "group"-statement would have been easier and better.

Edit: Aaaargh - now I get a problem because of missing groups