If I use the ACES (OCIO) colour space in Houdini, when it comes to the final render, say for a Youtube video, do I need to convert the render to a gamma 2.2? If so, how do I do this (using Mantra).

And if I render out the ACES version of the image (linear 1) and bring that in to Nuke for compositing, I know I must set Nuke to the same ACES colour space, but again, in the final output to Youtube or whatever, do I need to Grade it with a gamma of 2.2?

Presumably I must do the same if using After Effects?