Color doesn't let you output DPX when DPX clips were imported

[Kaku Ito]

This is not directly RED issue but why Apple Color doesn't let you choose to output DPX when a timeline with DPX from FCP was sent to Color?

I just found out that rendering FCP timeline with GlueTools DPX preserves gamma level perfectly, so I thought to place the composited DPX on to the native R3D timeline then recomform in Color to balance everything out.

Aside from this problem, I found out the following.

During the experimentation, I found that sending timeline from FCP to Color, both AJA 10-bit 4:4:4 RGB and Blackmagic 10-bit 4:4:4 RGB would result in gamma shift for about 10% (rising).

 

[Kaku Ito]

Opps, I contradict myself but actually, if you combine proxies or native clips with DPX then sent to Color, I was able to choose output as DPX! Phew! So, that solves my problem but still don't know why when DPX timeline alone won't let you output as DPX from Color.