Animate paint colour into b&w image

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Level 1

11 points

Animate paint colour into b&w image

What I am trying to achieve is this effect:

A full screen b&w image has paint strokes or blobs dropped into it that reveal the underlying colour.

I have searched all over but can only see After Effect tutorials on how to do this. I have the b&w image on 1 layer and the colour version on the layer below. I have tried masking different parts of the b&w image but whatever combination of mask (add, intersect etc.) I cannot create the build-up effect - the masks interfere with each other.

Rather than have a fairly rigid set of objects that reveal the colour I'd ideally like this to happen at random, in a paint brush style, until the whole image is revealed. I could skip the b&w bit and just reveal the colour image.

Any tips?

Thanks.

iMac (24-inch, M1, 2021, 2 ports)

Posted on Jul 25, 2022 9:52 AM

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Answer 1

Top-ranking reply

fox_m

Level 6

13,256 points

Jul 25, 2022 1:15 PM in response to melodeonman

Create all of your "paint strokes" inside a single group.

Clone the paint stroke group.

To the B&W image, add an Image Mask and put the Clone in as the source. Invert the Mask.

If you want to put the color image on top of the B&W image, you could add the Image Mask to the Color layer and put the Clone as the source without inverting the mask — the color layer will "paint on" the B&W layer. Instead of the B&W image under the color image, you can simply use a color solid for a color background, or no background at all.

HTH

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Answer 2

melodeonman Author

Level 1

11 points

Jul 26, 2022 4:03 AM in response to melodeonman

Thanks very much. I woke up sort of thinking about this as a solution, but finally got it working. One of my mistakes was that, instead of creating a separate b&w image externally, I just cloned the colour image and de-saturated it on the layer. Somehwo this was interfering with the effect.

I'm not sure why the paint stroke layer needed to be cloned - I tried it with just the one, original layer and it worked. Having got the principle working I then managed to achieve the animation that I wanted by using a splatter replicator as the image source. It all works perfectly and lets me play around separately with the various effects on the 'brush strokes' layer.

Thanks again.

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Animate paint colour into b&w image

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