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Author Topic: Displacement Mapping & Blending Tutorial  (Read 5489 times)

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« on: April 12, 2010, 20:00 »
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This week's tutorial, part of a series leading up to a bigger tutorial:

Displacement Mapping & Blending



« Reply #1 on: April 12, 2010, 20:52 »
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What do you call "mapping"?

« Reply #2 on: April 12, 2010, 20:55 »
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Took me a minute to figure out what you were doing here.  You're (by the way, you may want to correct all those 'you're's to 'your'), displacing the image with the paper texture and then you are laying the displaced image back over the paper texture with a blending mode to give "dimension" to the displacement of the pixels in the original image.  ie., without the lights and shadows of the paper texture, the original image displaced looks awfully funny :).

You may want to describe what the displace filter actually does so a reader understands what is happening:
"The Displace filter shifts a selection using a color value from the displacement map0 is the maximum negative shift, 255 the maximum positive shift, and a gray value of 128 produces no displacement. If a map has one channel, the image shifts along a diagonal defined by the horizontal and vertical scale ratios. If the map has more than one channel, the first channel controls the horizontal displacement, and the second channel controls the vertical displacement."

Also, I think you repeatedly used "pdf" instead of "psd", as the displacement filter requires a photoshop file.

Interested in seeing where this is going...

« Reply #3 on: April 12, 2010, 20:56 »
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What do you call "mapping"?

It's when you use a second texture as a "map" to displace the pixels in the first image.

« Reply #4 on: April 12, 2010, 21:04 »
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Took me a minute to figure out what you were doing here.  You're (by the way, you may want to correct all those 'you're's to 'your'), displacing the image with the paper texture and then you are laying the displaced image back over the paper texture with a blending mode to give "dimension" to the displacement of the pixels in the original image.  ie., without the lights and shadows of the paper texture, the original image displaced looks awfully funny :).

You may want to describe what the displace filter actually does so a reader understands what is happening:
"The Displace filter shifts a selection using a color value from the displacement map0 is the maximum negative shift, 255 the maximum positive shift, and a gray value of 128 produces no displacement. If a map has one channel, the image shifts along a diagonal defined by the horizontal and vertical scale ratios. If the map has more than one channel, the first channel controls the horizontal displacement, and the second channel controls the vertical displacement."

Also, I think you repeatedly used "pdf" instead of "psd", as the displacement filter requires a photoshop file.

Interested in seeing where this is going...

Thanks for the critique, I don't know why on earth I typed PDF, lol. And yes, you were right, I wrote it assuming people already knew what displacement maps were, so I threw in a note at the beginning that I'm trying to digitally wrap the image onto a textured object.

The final image will be pretty cool looking, I'm stepping outside my usual boundaries with this one.


 

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