A while ago, I lamented that there was no way to reassemble tiles rendered by the Tile Camera. I had a 50,000x20,000 pixel print image with GI, AO and glass that would have been impossible to render on a single machine. And reassembling all the multi-pass tiles by hand would have taken hours. And since there are no overlapping pixels, traditional stitching software is useless.
I posted this problem over at Adobe's Photoshop scripting forum. A programming whiz named Paul Riggott came up with this amazing script that completely automates Tile Camera restitching. Just place this .jsx into your Photoshop>Presets>Script folder. It'll appear in your File>Scripts menu on relaunch. Just a couple caveats: 1) It expects a single layer image. If you render [b]multi[/b]-[b]pass[/b], be sure to have [b]multi[/b]-[b]layer[/b] turned [u]off[/u]. Render each pass to its own single-layer file. 2) It expects to have only the images needed for a single pass in the search folder. So if you render out multi-pass, you must put each pass into its own folder. 3) It expects the total number of tiles to be evenly dividable into a square root. So your total number of files in each folder should equal the C4D Tile Camera "Tiles Per Axis" value squared (Tiles Per Axis²).
It’s been tested with Photoshop CS4 & CS3 (on Windows and Mac [Tiger & Leopard]). I’ve tested it with 8bpc, 16bpc, and 32bpc renders to TIFF, PSD and OpenEXR and it works perfectly and is very fast. I’ve also tested it with as many as 1000 tiles at 1:1, 16:9 and 4:3 aspect ratios and up to 55,000 × 35,000 pixels. The script is smart enough to handle any number of tiles or dimensions. Just make sure all the tiles are the same size (which is how the Tile Camera works anyway)