3D Map Reconctruction : Developer's Corner

Does anyone know of a utility to reconstruct 3D Maps from point data. Here is what I want to do:

I have a way to read the location of my character in Lineage 2. So I want to map out the land by having a bot explore and record where it can and can't go. But I do I store that into something I can use in the future to direct my bot to different locations?

LInverse

The amount of data this will involve is incredibly large. I tried something like this with everquest and a different scripting tool a couple of years ago. In the end it was just too slow to be worthwhile. The best compromise I could come up with was to keep an array of areas to avoid and just call a check inside the main loop and change direction if I enetered one of thoose areas. In most cases its best to just have pre defined paths to follow from place to place.