surface collusion

[RimeOCRLIB]

Good evening.
We mix tank example and mars game and it look really cool. But how we can manage collusion with ground? any opportunity to add physical engine?
http://www.buddism.ru/___SANGHA___/_MULTIMEDIA_/_LIBRARY_3D/_VWF/index.php?img_page=Screen+Shot+2017-02-06+at+01.35.02.png&ocr=1

Thank for your time!

[RimeOCRLIB]

We found collusion map in vwf code. Mainly 3d engines use grayscale map. So user can travel by map altitude. It is give opportunity to build relief in 3d world. Any chance to use grayscale collusion map in VWF?
Thank you.