If by that you mean an EXR that has been rendered as a few different tiles (example: A 4k UHD file rendered as 4 HD files) I have a semi automated gizmo I could send you by mail. By semi automated I mean it will stitch it all for you, but you'll still have to connect the right input to the right file.
Well, does it matter if the EXR tiles have multiple render passes? For example, I have 4 EXR tile renders and each tile includes reflections, spec, bump, ID color mattes etc. All I want to do is use nuke to combine my tiles and export them out as one image with all the passes included.
It does not matter, when using merge nodes in nuke you can set them to also mergeall. Then it's only a matter of Transforming each tile in the right position, merging all. Repeat for each tile. Reformat to make sure the ouput is the format of your tiled image.
For example, if you rendered a 4096*4096 image as 4 tiles of 2048*2048: Transform bottom right tile by 2048 in x (it will be out of frame, don't worry about it) Merge over Bottom left tile (also merge: all) Transform top left by 2048 in y Merge over the first merge. Transform Top right by 2048 in both x and y Merge over the second merge. Reformat to 4096*4096, resize type to none, uncheck "center"
Normally I would do it manually in photoshop, which is very time consuming, specially when each tile has render passes.
Thanks.....
By semi automated I mean it will stitch it all for you, but you'll still have to connect the right input to the right file.
Then it's only a matter of Transforming each tile in the right position, merging all.
Repeat for each tile.
Reformat to make sure the ouput is the format of your tiled image.
For example, if you rendered a 4096*4096 image as 4 tiles of 2048*2048:
Transform bottom right tile by 2048 in x (it will be out of frame, don't worry about it)
Merge over Bottom left tile (also merge: all)
Transform top left by 2048 in y
Merge over the first merge.
Transform Top right by 2048 in both x and y
Merge over the second merge.
Reformat to 4096*4096, resize type to none, uncheck "center"
I've made a gizmo for exactly this.
It takes the input and all channels (passes) and tiles them together in the following order:
------------------------------
| 0 | 1 | 2 | 3 | 4 |
------------------------------
| 5 | 6 | 7 | 8 | 9 |
------------------------------
and so on... taking each new frame as the next one along.
You do have to start the sequence at 1. so it should go from frame 1 - 25.
BBtileStitch.gizmo