The copter is Typhoon H. RealSense is version 1. Later I understood about ver. 1 and ver. 2.
My primary goal when I spent money was to have some kind of allert for not lowered landing gear near the field. I didn't get this. My RS obviosly is ver. 1.
I always landing in a meter or two from my position. This gives me chance to make a soft landing. With RS this sometimes is possible, but in most cases not. The copter stay over the ground and no force can land it. Tried with climbing, slow descend, fast descend, no way. This strange behavior is explained as "virtual obstacle". But I don't accept any unvanted virtuality. For me just enough be to have possibility to turn COMPLETELY off this augmented reality. I don't use any smart modes to expect help from RS in these tasks.
Last decision was to uninstall it. As a memory from RS copter slows descend in few meters above the ground, which is acceptable behavior. Now landing every time as I want.