P: Ability to use 3D LUTs

LUT shouldn't be applied to the RAW file. It should be applied as an optional step during the image processing . Even if LR processes the images as 16 bit ProPhoto RGB, LUT can be applied.

Amen to LR adding LUTs to the workflow. It's understood the imagery has to be converted to linear via TIFF or JPG to apply a LUT, cannot be applied to RAW inside of LR, but never mind. The choice to apply a LUT in LR, whether to visualize what will show up downstream or to simply to apply some fix to photos made possible with LUTs, can be simulated in LR via proxies, which it already does (RAW files are unaffected), then implemented upon export in the conversion process. This only makes good sense to add to LR. 

"By the way LUTs would not be so useful on export."

The Export LUT plugin creates (exports) LUTs from LR develop settings and develop presets.

For me it would be any kind of LUT. In particular converting from log to rec709 is not my primary goal with photos. I would prefer artistic/creative LUTs.

By the way LUTs would not be so useful on export. They would be great inside LR. On export they are better then nothing 🙂

" would love to be able to apply a LUT to my S-Log2 and S-Log3 photos AND videos"

Can you say more about which LUTs you'd like to apply?  Are they LUTs that convert the S-Log color space into the standard Rec 709 color space, LUTs that provide creative looks, or something else?  (I'm exploring whether to add the ability to apply LUTs to my Export LUT plugin.)

I'm another vote for implementing the application of LUTs in Lightroom not just in Photoshop.  I use a Sony FS7 and Sony a6500 in my work, and I often use the a6500 to shoot family photos (and to keep working on learning to be fast with that camera...), and for both professional and personal use I would love to be able to apply a LUT to my S-Log2 and S-Log3 photos AND videos.  Shooting test stills using the same 3D LUT that I plan to shoot in video would also be extremely helpful.  

More and more cameras are coming out with the abiltiy to shoot in Log modes, both video and photos.  I don't know, but I suspect that Lightroom is more in use by a wide spectrum of photographers and video/cinematographers, from amateur to pro, than Photoshop.  As the new cameras come out (Sony alpha, Panasonic GH5, etc), don't cede the field to some rival to come along and make the intuitive interface photo editor/library application that can apply LUTs. That's what we expect Lr to do.

Come on, Adobe!  This thread is THREE YEARS old! 

Agreed, that's what everyone in this topic clearly wants.  I'm just clarifying Tomas' comment, both for his sake and that of future readers who come across this thread.

We would like to apply LUT in LR! 🙂

It's not clear from your comment -- you do know that Photoshop can both create LUTs and apply them?  Whereas LR can create LUTs (using a plugin) but it can't apply them.

YES go for LUT's in photoshop!