Hasta La Motion!

So we’re undistorting some DPX plates in PFTrack, and wanting to re-distort them in Nuke with 3D elements included, using the STMap method. Pretty standard stuff, and we’ve got the workflow down, but for some reason PFTrack seems to be spitting out 8 bit images.

To explain: We create a UV ramp in Nuke (oversized to match the undistorted plates), render it to an EXR, and import it into PFTrack. Then we apply our inverted distortion coefficients to the ramp, and it all looks good. Up until this point, everything is going swimmingly. However, when we try to export this re-distortion ramp from PFTrack to an EXR to apply it in Nuke, the whole thing goes tits-up.

The EXR that comes out of PFTrack claims to be float; the metadata says it’s float, Photoshop says it’s float, but the pixel data is definitely 8 bit. As a consequence, trying to use it as any kind of STMap input results in horrible blocking artifacts.

So my question is, basically, is there a way to get PFTrack to process/export at anything higher than 8 bit? Anyone else every run into this issue?