Oh, I consider all formats, but I need to port them over to BlitzMax as it stands and that's a little...tricky here and there. I still have to figure out how I might actually just connect datablocks to C++ (or C) compiles, which are also possible through Bmax. I've had some trouble with that, which is why I had to write my own export routines for 16bit png, for example.
There is a freeimage library, but it's gigantic, literally 4 times the size of entire Verve, and it's full of redundancies...so...I don't want to use that.

But, yeah, I'll have a look at EXR, also because I kinda like the format.
