Can I extract shadows from a texture to make a transparent image (png)?

I have this image:

No Transparency

And I would like to extract the dark parts (shadows) to make a transparency consisting of black pixels at different alpha channel values. Here is a crude example image of what I am trying to extract:

Transparency

This way, if I put solid colors behind the image, that texture will show up over the new color and make it look nice and purdy.

I suppose another way I can ask this question is how I can turn a layer working with an “overlay” or “linear burn” blend option selected into a png consisting of black pixels at different alpha channel values.

Tough question to put in words, my apologies for any confusion.

Answer

Best bet is probably Select > Color Range. Then click a white portion of the canopy and play with the “Fuzziness” slider to get you where you want.

Once you do that click okay and your’e left with a selection. Make the selection a Mask (probably have to invert the mask afterwards). Then simply lower opacity for the layer and Save for Web.

You can save specific steps of various transparency….

20 percent 20%

40 percent 40%

60 percent 60%

80 percent 80%

100 percent 100%

Attribution
Source : Link , Question Author : AndyPerlitch , Answer Author : Scott

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