The Final outcome will be like followings:

Create From Scratch in Photoshop
If you have a tablet, you can simply draw the sketch by using the brush tool.

Don’t Have a Tablet?
If you don’t have a tablet, you can create the artwork in Adobe Illustrator and then imitate a hand drawing effect in Photoshop.
First draw a vector illustration. Then import it in Photoshop. Use a grungy brush and gently erase select parts of the image. Use the Blur tool to create the smug effect.

Step 02
Scan It
The easiest way — scan the drawing and set the layer blending mode to Multiply.

Step 03
Invert Color
If you want to have a white color stroke instead of black — go to menu Image > Adjustments > Invert (or press shortcut Cmd+i) and then select Screen blending mode.


Step 04
Create Color Gradients
What if you want more than just a black or white stroke (ie. colors gradients)? Then you will have to extract the drawing from the white background. A simple way to do this is by using alpha channel.
• Copy (Cmd+C) the drawing.
• In the Channels palette, create a new channel. Then paste the drawing in the new channel.
• Invert (Cmd+i) the channel layer.

Step 05
Go back to the Layers palette, create a new layer. Go to menu Select > Load Selection. In the Load Selection prompt box, select Channel: "Alpha 1" (which is the name of the alpha channel I created earlier).

Shortcut Tip: the shortcut for loading a channel selection is Cmd + Opt + any number key (ie. 1, 2, 3).
Step 06
Fill Selection
With the channel selection loaded, you can fill it with any color.

Step 07
Using It In The Design
For the purpose of this tutorial, I’m going to show you how to incorporate your hand drawing on a female model.
First, cut out the model.

Step 08
Fill the background with some sort of light glowing gradients.

Step 09
Paste the drawing on top of the model. Lock the layer transparency. Play around with the color gradients.

Step 10
Duplicate the drawing in the background to add more details to the image and finally got the desired image:

Now try this technique on your image and have fun :-)
Credit: webdesignerwall.com
Cool Blog. Thanks for sharing
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