Abs Scalar produces an absolute value from its input. In effect it turns all negative values positive.
Here is a cosine wave passing through a zero ground plane.
![Abs_Scalar_01.jpg Abs_Scalar_01.jpg](https://planetside.co.uk/forums/index.php?PHPSESSID=4200c08f4d6cb087c77c9d9270d7136b&action=dlattach;topic=26995.0;attach=92740)
When we pass the signal through an Abs Scalar, all values below the zero plane become positive.
![Abs_Scalar_02.jpg Abs_Scalar_02.jpg](https://planetside.co.uk/forums/index.php?PHPSESSID=4200c08f4d6cb087c77c9d9270d7136b&action=dlattach;topic=26995.0;attach=92742)
This method can be used to turn Perlin Noise...
![Abs_Scalar_03.jpg Abs_Scalar_03.jpg](https://planetside.co.uk/forums/index.php?PHPSESSID=4200c08f4d6cb087c77c9d9270d7136b&action=dlattach;topic=26995.0;attach=92744)
...into Perlin Billows.
![Abs_Scalar_04.jpg Abs_Scalar_04.jpg](https://planetside.co.uk/forums/index.php?PHPSESSID=4200c08f4d6cb087c77c9d9270d7136b&action=dlattach;topic=26995.0;attach=92746)
If there's any errors, omissions or questions about the above, please leave a comment and we will add further details in this post when relevant.
https://planetside.co.uk/wiki/index.php?title=Abs_Scalar