Click the Go to Parent {} button once and click the Add New Layer {} button to create our second layer. Click the None button and assign a Noise map to our second layer.

This is our first detail map. Set the:

» Tiling to 2 all over (repeat the map)

» Noise Type to Fractal

» Size to 25

» High Threshold to 0.55 (more white)

» Levels to 3

You can leave the Phase at 0.

Click the Go to Parent {} button once. Set the Second layer to Multiply.

Click the Add New Layer  button {} again. Click the None button and assign a Cellular map. This will be our second and last Detail map.

Under Cell Characteristic set the:

» Type to circular (cloud like)

» Check the Fractal box

» Size to 25

» Spread to 1 (uniform spread)

» Roughness to 0.5

Go back by pressing the Go To Parent button {} and set the third layer to Multiply as well.

Go to the Top Level and assign a Noise map to the Diffuse Map slot. Set the:

» Black color to a dull blue

» Noise Type to Fractal

» Size to 25 or so

» High Threshold to 0.7 (less blue)

Switch to the camera view by pressing {C} and render the thing! You should get something like this:

5/5 Tweaks and tips

Select the Light and set its color to a yellowish white. Also raise its multiplier by a bit to compensate.

It looks even better with a thought-out background.

If it still looks off, try different light positions and base opacity mask tweaks. Because this effect depends on a great deal of variables you can also download our finished scene:

This is what we came up with:

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