Terrain or big mesh

Blitz3D Forums/Blitz3D Programming/Terrain or big mesh

I have been messing around with a zoom-style Flight-simulation.

If I use a big terrain, it works, but I can only give it one texture.

But if I create a big mesh with different surfaces, I have trouble with the memory.

How many vertices can Biltz3d handle maximum???

I have a grid of about 2200 x 3000. I would like to zoom out so that I can see the whole terrain/grid, and then zoom at every single position and gently increase the resolution.
Then of course have different textures for trees, water, grass, snow, steep mountains etc.

Has anybody got an idea?