I finally found walkmesh in xenogears. It's located in second file of field pack (previously I thought it was hrc).
The format is not completly understanded, but I already render some images =)
Some dangeon in Shevat
Start room
Blackmoon forest (first map)
But there are from 2 to 4 different walkmeshes. The first one are always the lowest,others are seems set the topest part (you cant jump hire than that). But there are walkmeshes that doesnt have sense to me... for example start room:
or desert
Need to explore more.. there are final part of file that I dont look into.