After Effects help

[Pavelcz]

I have changed the footage into black and white. Now imagine you have a magic wand and when you point onto an object it would become coloured. How would you achieve this. So far ive rotoscoped the object and coloured the object but i want the object to get colour gradually. You know, like a gradient (ramp) from the middle of the object. Thanks.

 

[Jeff Troiano]

Once rotoscoped, I think you would have to duplicate the object layer. Make one black and white, and the other color. Make sure the b&w layer os above the color layer. Then key frame the transparency property of the B&W layer to go from 100 to 0 over the amount of time you want it to take. This should turn the object from B&W to color.

 

[Pavelcz]

A simple opacity mask, why did i not thought of this. Thank you.

 

[jmoschner]

You could also keyframe the feather and expansion of the layer mask. This would allow it to fade in and expand from the center.

 

[MileCreations]

You could also keyframe the feather and expansion of the layer mask. This would allow it to fade in and expand from the center.

Yeah agreed agreed with this, at least make it expand a little rather than just a boring cross dissolve.