See povray.beta-test.

global_settings { assumed_gamma 1 }

light_source { <-1, 1, -1> * 1000, rgb 1.5 }

plane
{  -z, -5
    pigment { rgb 1 }
    normal { crackle 2 }
}

OS: Windows 7 Ultimate
Word: 32 bits
Cores: 1, to the best of my knowledge

Attachments:
crackle-v36-set36.png - POV-Ray 3.6.2 with Version=3.6 on the command line
crackle-v37-set36.png - POV-Ray 3.7RC3 with Version=3.6 on the command line
crackle-v37-set37.png - POV-Ray 3.7RC3 with Version=3.7 on the command line

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