I was asked this question this week, and wanted to share the answer.
Question: When I render particles with an Alpha Channel and import that into Flash, there is a dark halo or weird edges around the particles, which makes compositing impossible. I am rendering out as an FLV with Alpha. What am I doing wrong?
Answer: Render with Alpha channel, but as a straight Render. This should solve your problem. This is almost always the solution to problems like this. If you don’t know about Straight Renders, I have a short tutorial called “Straight Vs. Premultiplied” That you can watch here.
There’s also a follow up tutorial called “Remove Color Matting” which may be useful to you as well, when dealing with the halo issue.
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Yes Straight render resolves the particles issue…
Out of the frying pan into the fire
Another Question
is it possible to alot more ram to after effects and by doing that does it get rid of the “out of memory” error
Spec of My Computer :</b core 2 duo 2.56 Ghz with 4GB RAM and a 8600 NVIDIA GeForce GT Graphics card with a video memory of 512 MB Operating System = windows XP sp2. Hewlet Packered
Current After Effects CS3 settings : settings imply memory and cache preference settings. Maximum RAM cache size = 60% = 1.2 GB which is confusing because 60% of 4 GB = 2.4GB (is the math going wrong because i am on a 32 bit environment.. windows XP :S ) and will enabling disk cache help ?
thanks for your help
Note that some things have changed between CS3 and CS4. I have an explanation on my blog:
http://blogs.adobe.com/toddkopriva/2009/06/flash_flv_alpha_channels_strai.html
Never mind i found the solution. Here is a short video tutorial which explains how you can assign more RAM to adobe after effects CS3 in windows xp environment
http://generalspecialist.com/tutorials/ae7_ram.html
Thanks Todd!
I always had a question about RAM. Disk cache is supposed to be allocated HDD space for a program or system to use when RAM is getting low. If so, why is it that programs like AE should EVER have memory problmes? Why can’t i just set 20 GB of disk cache (I have plenty of free space on my HDDs.) Even if using HDD space is slower then RAM, it’s better then a crash!