GIMP Version: 2.6.11
Operating System: Windows
OS Version: XP - SP3
GIMP Experience: Intermediate Level

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Does anybody know of an easy way or script to replicate lines with increasing spaces between them as if around the edge of a disc or cylinder? (like the texture on the edge of a coin.)

You could use a set of guides and a fuzzy brush draw the lines in a rectangle selection. The coin edge would be the combination of a metallic gradient thats set the biliner, than with the fuzzy lines, to add depth.

Dot brush with spacing then motion blur. Added some gradient tricks to make it dark/light/dark. Something like this Erisian?

Bonjour,

2 filters: one to obtain lines, one for different spacings between the lines.

Thought I would do some additional processing on my original. I cropped, dupped, horizontal flipped set to darken, then added some metallic effects (thanks to Tom's Metallic G'MIC preset) and a few additional tweaks for this result.

I would have said that rendering a grid: Filters>>Render>>Pattern>>Grid then mapping the resulting grid to a cylinder Filters>>Map>>Map Object but I don't think it's doing it properly at the edges:



Kevin

Using my path-in-betweener script:
- with the Path editor make a first path along top edge
- with the Path editor make a second path along bottom edge
- In the Path list, right click either path, and "Tools/Generate intermediate paths"
- select the other path as the end path
- enter total number of lines
- use the "Swing" stretch (which happens to be using a sine function, which is exactly what we need here)
- use no Guide path
- this produces N paths, all marked "visible"
- in the Paths list right click any of these, and "Merge visible paths"
- stroke the resulting path



PS: looks like I forgot to update the doc, which still doesn't know about the more recent parameters

I like this result and this would have been my suggestion as well if you hadn't beaten me to it. You can always crop the unwanted portions of the edges like I usually do to remove the edge distortions after using Motion blur.

The only problem I can see is isolation or removal of the shadow if it is not wanted or needed for the intended application.

The shadow is easy to remove - just select No Light on the Light tab of Map Object

Just for a laugh, I did it on paper... with a pencil, compasses and a ruler



Kevin

This should give exactly the same result as my script