Follow this step by step tutorial to draw stones starting from scratch.

I found this photoshop tutorial here, so I decided to make a Gimp tutorial too.

First open a new document with a black beakcground, create a new layer called “stones”, and draw many circle with different dimensions, in order to get a similar result:

1

Now we must made these circles more similar to real stones. Click on Filters—>Distorsion—>IWarping.

As first step click from the inside of the circles toward the outside with move tool:

2

Then select reduce mode to make the space between the stones smaller, you will obtain the effect in the image below:

3

At this point, position the cursor on the stones layer and right – click—>Alpha to selection (in this way you can select only the stones), then change the primary color #ac9362, create a new layer called “color” and color the stones. Change opacity to 60 and layer mode to multiplier.

4

Click on Filters—>Noise—>Noise HSV and configure the options below:

5

Click on Filters—>Blur—>Gaussiana and set blur range to 2. The create a new layer called “lights”, select the Hardness brush (a Gimp default brush) and draw lights with white color, they must all have the same direction.

6

Click on Filters—>Blur—>Gaussiana and soften lights to 50, then change layer opacity to 65.

Create a new layer called “shadow”, change layer mode to weak light and repeat the process done for the lights, but with balck color and the direction must be opposite.

7

As last step, add a theme and soften the black background between the stones. Right click—>Alpha to selection on the stones layer, then position the cursor on the backgound and apply a gaussian blur in order to get this: 

sassi_tutorial

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