Peter Ronhovde

 

Solid Noise Difference examples

Our test images use an 800x600 pixel image in RGB color mode. Persistence is fixed at ½ here, and we apply the same random seed in the first three tables in order to illustrate how the different effects modify the same texture. Click on any image to view a larger version on the right.

Lightning effects here begin with an inverted Liquid Distortion (or Difference mode on white). The lightning in the top-right image is enhanced (from the one on its left) using a straight levels adjustments to the inverted Liquid texture. Repeated Difference Clouds applications in Photoshop can also generate textures hinting at a similar effect, but the Liquid distortion yields clear and vibrant results.

The other images use a variety of repeated difference mode applications at different settings. At least one application of Liquid Distortion often brings out some interesting textures. Interestingly, the bottom-right image applies the Turbulent Distortion several times, which reveals the square lattice used to generate the noise via Ken Perlin’s procedural noise algorithm.

 

 

Unless otherwise stated, all content and images are copyright © 2013 Peter Ronhovde

Images of the Sun are from NASA archives.