Maybe not the all in one solution you want, but why don't you dump the 24-bit and 32-bit TGA's into their own folders, and process them there with different actions?
I did a test, yes. It ends up creating an alpha channel for all of them, or deleting the existing ones, depending on whether I said 24-bit or 32-bit when I made the action. Thanks, I'll take a look at XNview
Ive got a folder full of tgas, and I need to make sure theyre all using RLE compression. The first solution that came to mind was to make an action that saves the tga with RLE compression, and then use batch processing to do it on the whole folder. But theres a problem, some of the files have alphas, and some dont. So…
Thanks ivars, they're all different resolutions though :( I tried sorting by size, thinking that it would still break them up into groups of different resolutions. But the fact that there's 1300 TGAs with resolutions ranging from 128X128 to 2048X2048, some 24-bit some 32-bit, confused things a bit, to say the least.
I went with Advanced Batch Converter. Just point to a folder, choose a format (along with compression settings) and you're done. The actual conversion is super quick, and I didn't have any problems with 24-bit or 32-bit TGAs It's a bit pricey though, so unless Photoshop can't do it I wouldn't recommend it