They could make them in 3dsmax, lightwave, maya, blender, in fact it doesn't matter what editor they use, but the plugin they use for exporting the format.
So what you need is to write an another converter to reconvert them in a format readable by one of those editors, like someone did for GunZ maps.
"A season changes. and it is warm spring.
The voice of the children who play in that hill can be heard.
If those children have all strange power,
they are collected, and it may sometimes become a big miracle.
What do you hope for if it does when you can cause a miracle?
My wish is only one..."
Renshou - Dainn lv 6x [DashAttack] | LightRobotex - Sieg lv 5x [Ruan] | Sayeko - Eir lv 5x [Ruan]
Renshou project emulator lead developer