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Gradient map for shatter

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Craig RickerGradient map for shatter
by on Feb 28, 2012 at 5:01:32 am

Ok, so what i've got is a layer that i've drawn a mask on.
I've then applied the shatter effect to this layer and made the shape of the shatter effect puzzles pieces.

Now, i'd like to control individual pieces using a gradient layer.

I've taken a still frame of wireframe, to see where the pieces are, and then have gone and drawn little boxes of ranging shades of gray inside individual pieces of the wireframe.

But I just cant seem to get gradient layer to work properly.

I think I dont understand what shades of gray i'm supposed to be using.

When I change the threshold value, a lot go at once rather than individual pieces, even though the gradient layer is full of varying shades of grey.


(I need at least 8 different areas that shatter on cue)

Any help would be most appreciated.


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Roland R. KahlenbergRe: Gradient map for shatter
by on Feb 28, 2012 at 9:41:15 am

You should be using grey, solid colored (and not gradients) segments to denote the areas within your greyscale image. The gradient property works by looking at the greyscale tone of a secondary image whereby lighter areas will be shattered first.

If you do the math 256/8 (256 different greyscale tones) divided by 8 pieces dictates that each piece should have RGB values with a difference of 30, starting from 255,255,255 for pure white.

There should be rounding off errors but that's where you tweak the Threshold values.

You should end up with 8 pieces with solid greyscale tones. Precomp this greyscale image and nest it into the shatter comp.

You then KF Shatter Threshold to total when a piece shatters, or when the next piece shatters. You will require a bit more math - 100%/8 (Shatter Threshold divided by number of pieces)= approx 13%. WHere increments of 13% (approx) will shatter the next darker shade of grey.

HTH
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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Craig RickerRe: Gradient map for shatter
by on Feb 28, 2012 at 8:59:41 pm

Got it to work with your help! So many thanks!!!


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Roland R. KahlenbergRe: Gradient map for shatter
by on Mar 3, 2012 at 4:40:58 am

You're welcome Craig.

Cheers
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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