A dual-purpose file: this darkish blend of blues and greens is available tailored for a wide-screen laptop or iMac -- there's also a version rotated and scaled to fit an iPhone4 -- but they're also all useful as seamless backgrounds on web pages, profiles, or wherever else you see fit to use an abstract HD image.
Large graphic files that tile seamlessly are harder for the eye to discern, particularly if parts of them are covered by text in a table, etc. In these cases, the 640x960 variation produces a different result when tiled, of course.
The thumbnail was cropped and lightened a bit to help give some idea what you'll have at full scale...
Red and blue not-quite specular highlights that don't show well in the thumbnail image on a brown, swirling bark-like high-res large-scale background that will tile seamlessly if/as you pass 1920 pixels wide or 1200 vertically: a dark, lovely hd wallpaper even if you don't need it to repeat.
Turn a Nikkor lens on itself in the mirror in a darkened room with the aperture shrunk down to f16 and you can capture a refractive effect from the flash as you freeze and capture the lens interior.
This didn't quite start as macro photography (as you can see elsewhere) by certain definitions, but then the artist set to work to make it into a large, dark seamlessly tileable image that manifests some lively "light" patterns to keep it lively as it repeats at 1920 pixels horizontally and 1200 vertically. An interesting image even when it doesn't get tiled...