Sorry guys its gonna be a while till i am back online for proper so bear with me. This is s project i will get a good way to finished so i will be needing some help along the way. As soon as i get my pc back online (at a friends house at the moment) i will post a link to what i've got so far. The first thing i'll be needing help with is using vertex buffer objects in qb64 to increase the speed of drawing the terrain but i've got a few other tricks to make that faster to. i've not yet ported the relevant GL commands to GDK_GL but i've done the research on the commands and it should be quite straight forward. The next thing after that is calculating the height if the vertex the player is on the make it so you walk at the same height of the terrain. Then comes the fun parts and also where i expect my old coding buddies darth and CG where come to my rescue as maths is not my strongest skill, par ray casting part collision detection math but thats a way of and partly covered in an old thread i made when i was updating GDK's capabilities.
Hope to speak to you all again soon.