Thanks for the ideas and answers, sorry it took a while for me to reply stuck in hotel rooms without net access.

I shall keep playing round with the functions of custonHDS. Regarding the bsp question. I was a little confused about how the portal demo in the meshes folder actual works. Could someone explain the processes running?

My project places buildings according to a 2D array. I am struggling with the inside of the buildings and the portal demo is interesting but I don't understand how it works.

One last question how do you texture different parts of the cube i.e. the top or sides?

Thanks for the help, GLscene is a great tool that I am slowly getting used. So any ideas will be great, I will post a few pics of my project when I get a moment.
Whitt