Thanks for your feedback 
Navigation and scale:
- I wanted something similar to what we have with common Molecular Visualization softwares. But yes, I feel that I should do things differently; and at the very least all translations/rotations should be controllable with only the mouse
- I am also a Leap Motion user, so … I really want to give it a try ! The idea to see some hands manipulating atoms/molecules in a Virtual World is quite fun ! Imagine “opening” molecular complexes with those hands to see the contact interfaces and inside ? And of course, the possibility to manually “dock” two molecules together… that’s something I would really wish to see and that seems feasible. I imagine VR gloves with Haptic feedbacks (unavailable but some are plans for Q2 2016 !) would even give a spectacular and insightful feeling when docking those molecules
For the lag:
- I plan to use LOD for the spheres and anyhow the quality of mesh will be customizable, as well as materials. For the moment I use shared Dynamic Materials so I can easily change color mapping (often needed during visualization), but I understand it renders more slowly ? I’ll have to do some tests.
- I have not yet set the max draw distance for the spheres and this might changes things a lot… !
- Perhaps some tweaking regarding DFAO & distance of occlusion…
Next phases:
- add functionalities & representations common to molecular visualization
- leap motion
- UE physics engine to animate those molecules: they are not static objects and they fluctuate from that average position depending on the environment and partners
Bests