How can i key out the white screen on my footage?

[paki123]

I have a blood footage from detonatoinfilms. but its white. i know in fcp u can right click and press composite, and then normal or screen or whatever. and its only the blood. Is htere a way to do something similar like this in afterfx?

[triplej96]

You can try color key then chose your white or luma key and key brightness.

[paki123]

it doesnt work i tried

[Jason Adams]

AFter FX also has transfer modes. Just use the same TMode you used in FCP in AE.

[Arson]

it doesnt work i tried

Of course it works.

Both lumakey or a color keyer like keylight work with white. Use the eyedropper and adjust the key color tolerance value.

[triplej96]

Make sure you have transparency checked? The small square box.

[paki123]

it just turns black when i use color key or keylight

[Hawk Teflon]

:::Echo::: do what jason said. he's right. use the composite modes just like in FCP

[triplej96]

They are right that would be even easier transfer modes...

[metro2307]

Detonationfilms explains the transfer modes to use for the different backgrounds.

[cwiegert]

try the "multiply" transfer mode

[bimdas]

as everyone is saying, use multiply to knock out whites and screen to knock out blacks.