Quote from: Jonathan on November 10, 2011, 07:45:15 AM
Thanks all for your kind comments. I decided to keep AA and detail low as I felt detail was less important in an animation. PC is 3.2GHz, nVidia motherboard (780SLi), 8Gb RAM, 1.5GHz GeForce 580GTX Graphics card. I was also pleased with the fly-through through the branches. Had to do a number of low res renders to get it right. Not being able to see any detail on the preview render makes it tough. Thanks again....and any ideas on how to reduce the flicker? Would also like to know how to get some branch movement too 
Well actually, AA and detail ARE important in animation.
I'll give you some short examples and explanations:
If you use GI then use settings like GI 1/6/48 to avoid flickering.
Accuracy/detail of GI is linked to the detail setting, so there's the first reason why detail is important

When it comes to rendering terrain and other non-raytraced rendered elements all is dependant on the detail setting. The lower the detail the less accurate the calculation and the more likely there will be great differences between frames. That's the second reason

Detail blending is an algorithm which blends geometry/subdivisions between frames. Default = 0, you might need to increase it to 0.5 - 1.
To avoid flickering of populations you need higher AA settings.
Jon (Hetzen) quite recently posted about using AA16 up to AA32 to get noise-free animated populations.
Very important is that you use adaptive sampling to keep renderspeed ok.
Set AA to 16 and set first sampling to 1/16th and set threshold to 0.1 to avoid the render from applying unnecessary AA everywhere.
You can find more information on these settings by advanced searching for "adaptive sampling" + my username or Hetzen.
Other sources of flicker can be jittering of shading points and detail.
The latter you can find in the renderer already.
Jittering of shading points can be disabled in the "render subdiv settings" node.
Search for it and you'll find how to access it.
Further there are two must-read topics on the rendersettings:
http://forums.planetside.co.uk/index.php?topic=8300.0http://forums.planetside.co.uk/index.php?topic=6442.0 => honestly, I think this topic should be updated, but there's still a lot of useful information in it...
This should keep you going for a while

Cheers,
Martin