Tip #1: Don’t work on long clips. Limit your pI3 clips to 30 seconds or less if possible (10 seconds would be even better).
Tip #2: Make sure hardware acceleration is turned on in the OpenGL page of the preferences dialog. If it’s not turned on or not available, that’s your problem.
Tip #3: Make sure you have the latest drivers for your graphics card. Go to your graphics card manufacturer’s website and download the latest drivers. (Could be ATI, NVidia, etc.) Switch pIllusion to software rendering. If the speed doesn’t decrease much, your graphics card is not giving you the boost it should be. It could be underpowered or need updated drivers.
Tip #4: Make sure it’s not your background video that’s causing the trouble. Remove all emitters and use your video only. If it’s still slow, try converting to a different movie format, or JPG image sequence. Do not use “uncompressed” video! Use a lossless codec like HuffYUV or Lagarith (or “Animation” on Mac). Conversely, remove your video and see if it speeds up.
Tip #5: Render in layers. If you need to use several emitters and each is complex, try rendering 1 or 2 emitters at a time, saving with transparency (alpha) and layer them in your video editor (or load them in pI3 as a new layer).
Alan.
http://www.wondertouch.com