Note: This works best with a nicely exposed photo... not too dark or too light. I have only been successful with close up portraits of people, not with outdoor landscapes. I have a modified technique that worked for a landscape, which i may post at a later time.
1) Open your photo. For this tutorial, you can download my source file and play along. Here is the file:
http://www.informatik.com/john/sketching-baby.jpg. You will get the exact same effect as me if you follow exactly. There is absolutely no artistic brushing involved. (Although you could, as an option, which i will explain later.)
2) First, Duplicate the BG (Background) layer. Name it "Grayscale"
3) Desaturate the "Grayscale" layer. (Image > Adjustments > Desaturate)
4) Duplicate "Grayscale" layer. Call it "Lite FX"
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OPTIONAL STEPS: I used it to give a slightly more textured look...
5) Go to your Channels tab, and create a new channel.
6) Fill channel with White
7) Add Noise (Filter > Noise > Add Noise) For this image, use amount of 30%, Uniform, and Monochromatic.
8) Run the Crosshatch filter (Filter > Brush Strokes > Crosshatch) For this image, i used the values of 50/6/1.
9) Rename this channel "Crosshatch"
Now we want to create a new channel with a mix of either R, G, or B (they are all the same), and the Crosshatch channel. We do this with Image > Calculations.
10) Run the Image > Calculations command. Use these values:
Source1: <current document>
Layer: Merged
Channel: Crosshatch
Source2: <current document>
Layer: Merged
Channel: Red, Green, or Blue
Blending: Linear Burn
Opacity: 20%
Result: New Channel
You could use a different blending method. Multiply looks like it would work, but didn't try it. I tried to use a blending mode that kept the look of Red, Green, or Blue channels with just a "hint" of the crosshatch blended in. Be very careful not to use a too high Opacity. 20% works with this file. You may need to redo this step multiple times until you get the effect you want.
11) Rename your new channel "Linear Burn".
(This optional section is over)
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12) Download Trimoon's Pencil2 Lighting Effects setting file and install it. Click
here for the download and instructions.
13) Click on the "Lite FX" layer, and run the Pencil2 Lighting Effect (Filter > Render > Lighting Effects) In the Lighting Effects window, select Pencil2 from the list.
If you did the "optional steps" in this tutorial, then in the "Texture Channel" section, select "Linear Burn". Otherwise, leave it at the default settings.
14) Still in the "Lite FX" layer, make the layer mode "Overlay".
15) Adjust the opacity. I used 77% in this image. You may need to readjust this later.
Next step is to create a white layer on top of all layers, and then mask out sections, to reveal the image underneath.
16) Create a new layer. Call it "Layer Mask". Fill it with white. Don't create the mask yet. The mask will be automatically created in the next step using grayscale information from the "grayscale" layer.
17) Click on the "Grayscale" layer. Select All, and Copy to Clipboard
18) In the Channels tab, Create a new channel.
19) In the new channel, Paste the clipboard contents (Edit > Paste).
20) You now want this channel to be a selection. Go to Select > Load Selection... Leave at the default settings and click OK.
21) Click on your "Layer Mask" layer, and go to: Layer > Add Layer Mask > Reveal Selection. The underlying image is now masked with a grayscale version of the image.
NOTE: You could mask manually, by skipping steps 17-21. You create a layer mask with the mask set to hide everything. Then with a paint brush and a low opacity setting, brush in the underlying image. My technique is just much much faster and seems to give a good result in this image.
The image is now complete. But I went a little further with it:
You can add contrast to either your Layer mask, or the "Grayscale" layer. I chose to do it to the Grayscale layer because Photoshop allows me to use an Adjustment Layer. You cannot do adjustment layers to layer masks.
22) I added an Adjustment Layer (Curves) to the "Grayscale" layer. I pulled the top right point to the left until it looked good.
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That's it. It's a lot of steps, but if you really think about it, it's really pretty simple. It only gets a little hairy if you do the optional steps of 5-11. But you can skip those steps and will still get a pleasing image.
John