choochoo

What is a good way to get the following effect? In case the above image is too subtle, here's the same image with increased contrast: It feels kind of like a rocky surface but the surface edges are more ordered than regular rock so I think I need something different from the usual render clouds strategy.

Thank you, Dithering, Gradients Galore and Noise Choice should serve me well.

I have this image of some squares: In this image there is a subtle effect that I can't figure out how to do. If I zoom in closer we have this: and even closer we have this: scaled up version: How do I make the effect that you see in the last 2 images? It looks like some sort of noise except it's only 1 color and it's scattered in a predictable way(so not really noise I guess). Is there any good plugin for making this effect?

Thanks, 'ZIP Archive' FileType Plugin (.ZIP) is exactly what I was looking for.

Say I have a 256x256 image and I want to extract 16 64x64 images from this image and save them as 16 different files. Copying and pasting into a new file gets quite tedious after a while especially for larger images. Is there any good way to automate this task? Maybe a batch script or a quick plugin? I'm familiar with programming and understand the basic codelab script however I'm having trouble from there. What function do I use in order to save a new file? From there I guess I just put it in a for() loop and make it run 16 times. Any ideas?