I want a blood effect on a white cloth background.
On close ups I want to see the blood splatter happen in real time, so I am using
I was wondering,
Later on I want the blood to appear on the cloth covering the wall on different shots. How will I add this in digitally?
Will it be easy enough to take a still frame of the blood then paste it on in after effects/adobe prem? Like an video/still overlay?
Would u suggest that I keep the back wall absoulutly clean of fake blood,
take all the close up shots of blood splatter on a seperate cloth
and then digitally add in the blood effects in post?
Is this going to be relatively simple to do?

Hi Gary,

If you are going to add something in later in post production, and your shot is locked off (on a tripod that's been locked down so there is no movement in the shot) then it might not be too difficult to do what you want.

If your shot is panning, zooming or moving, it will be much more difficult to get a believable effect.

A great place to start would be to take a look at this tutorial by Andrew Kramer: VIDEO COPILOT | After Effects Tutorials & Post Production Tools (http://www.videocopilot.net/tutorials/blood_splatter/)

Another good reference is Mark Christiansen's book: Amazon.com: Adobe After Effects CS4 Visual Effects and Compositing Studio Techniques: Mark Christiansen: Books (http://www.amazon.com/Effects-Visual-Compositing-Studio-Techniques/dp/0321592018/ref=sr_1_1?ie=UTF8&s=books&qid=1242310442&sr=8-1)

Hope this helps.

Hi Gary,

Not sure what look you're trying to achieve, but some of the the stock footage from Detonation Films might help.

Unit_K (http://detonationfilms.com/UnitK.htm)

cheers
James

I made this experimental video back when I was in school.
YouTube - Haime the Movie (http://www.youtube.com/watch?v=Mtj5uNoRFV8)
It's done w/ blood squirting in front of white paper -which I keyed using a Luma or color key effect. I think it works fine to key out squirting blood over white.
But I'm not clear if you want to key blood from white, or if you actually have white cloths on set and need to splatter blood on it.
If I understand you correctly, you want blood to splatter on some type of surface in your movie? If you actually want the blood to come in contact with something you should just do it on set. If you can be more specific I could offer some suggestions.