[Aurelien Guegan]

Thank you very much Jack.
We are going to try the TIFF export from Resolve to see how it goes.

Meanwhile, I asked the lab technician to check again our dpx in his Scratch (this lab has a Scratch grading system / Easy DCP). We wanted to check if our program had the same gamma shift on the Scratch and on the faulty DCP (also we needed to rule out any calibration issue). He says that the dpx is read as log by the Scratch. Of course it isn’t, since it’s our rendered grade straight out from Resolve. And if you check the curve of our dpx it’s far from a log curve.
Anyhow the lab guy forced the scratch to read the dpx as lin. And he says that then the film looked like our faulty DCP (washed off, lifted blacks and midtones)… This would confirm to me our issue : wrong gamma interpretation – we graded on a DCI projector with a 2.6 gamma and a rgb to xyz display lut in Resolve. The dpx is read by the Scratch considering it’s a 2.2 gamma level, so as Easy DCP. Therefore everything is lifted.

Why does Scratch reads the dpx as a log? There’s no way resolve exports log… Anyway we decided to do the TIFF export from Resolve and test it both in Scratch and easy dcp. Tiff is both linear and xyz… So we should know more from there!

But if you guys have any ideas or thoughts…

Thank you very much.

Aurélien

LYLO POST-PRODUCTION
PARIS
FRANCE

[Aurelien Guegan]

No one?

Any help would be useful…

Thanx

Aurélien