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Hi! I am having the same issue still!

I have been trying to render a still image as PSD file, and while I am working in ACES color space, I am exporting to a standard sRGB format. And for some reason I cannot get it to be 1-on-1 how the LV looks....
The one thing I was able to deduce is that somehow the PV/renderer 'linearizes' the image and therefore the PV version looks different. So when I open my rendered PSD file and put a gamma transformation of 1/2.2 I end up with an image ALMOST close to the LV, but still not 100% exact...

Anyone with some new updates on this? I find this very frustrating that I am not able to just output a standard sRGB image from ACES

freakanay wrote: I have been trying to render a still image as PSD file, and while I am working in ACES color space, I am exporting to a standard sRGB format. And for some reason I cannot get it to be 1-on-1 how the LV looks....

Seems ambiguous. By "standard sRGB", are you referring to the ACES sRGB ODT? This is the ACES conformed sRGB output. Other than the Linear ACEScg / 2065 color spaces for post.

A half way through ACES pipeline isn't an ACES pipeline (working in ACES, exporting in an sRGB flavor, bypassing ACES RRT+ODT).

A PSD file isn't standard or conventional and unrecommended. For proper render export, EXR is indubitably the right choice. Some links:
File Format Debunk (EXR / TIFF / PNG...)
Render Export Settings Guideline

Worth mentioning that ACES is not obligatory and superior, easier solutions are available. Rather just one (link for further reading on AgX).