Please need help :Render Settings for avoid flickering and speed-up render proccess..

[Please need help :Render Settings for avoid flickering and speed-up render proccess..]

Thanks for the reply.. That Thread was really helpful.. I was in little confusion about flythrough as well as Incremental in LC and Irr. Map.. No thats not the problem of Anti-aliasing..

 

Once again thank you very much Matt Sir...

Greetings from India. )) 

[Please need help :Render Settings for avoid flickering and speed-up render proccess..]

I'm a 3d visualizer and recently working on a walk-through..
Here is the scene descreption :
1. There are lot of trees in the scene so I used ITOO Forest Pack for it..
2. Optimized meshes (other objects) as much as possible..
3. Less reflective/refraction are used..
4. No Displacement (Turned Off in render setup too)..
5. Lights : VRaySun for main source light and VRayDome with HDRI for Environment..
6. Softwares : 3ds max 2012 x64, VRay 2.0, Forest Pack PRO 3.6.2
6. Machine Config. : i7 -3770 CPU @ 3.40GHz, Memory : 16GB, Graphics : NVidia Quadro 600 , OS : Windows 8 PRO x64
So now, problem is I get flickering in tree shadows/darker areas of trees... as well as it takes much time to render (15mins/frame)..
I need help for render settings.. Please can you suggest good settings to get out from this?? As well as any suggestion for speed up process of rendering??

 

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