After trying and failing to calibrate with CalMan Home for LG using the new 17 Point Fixed Grid method that was introduced in the last Beta, with the release of the latest R3 RC1, I thought I'd try again.
Coincidentally, the panel on my LG OLED65C9MLB (UK Model) reached 300 hours usage time yesterday (replacement TV, appox a month ago), and because of this, I had just finished performing a new 3D LUT generation using LightSpace early this morning (UK GMT) when I noticed that the new R3 RC1 had been released. So it was a great time to do a run with CalMan and compare the two and see how they hold up to each other. Interstingly, I haven't suffered from any of the issues reported by some recently. The only issue I had last week was during the Beta when the LUT actually failed to generate, which I reported to Portrait and which seems to have been fixed quickly. Beta testing and feedback working as intended, so props for that!
As a LightSpace user, I have to say in all honesty, I much prefer to use that software personally, and I will continue to do so. But the following is a completely unbiased opinion from, what I would describe myself as being, a novice calibrator. I want to say now though, this is not a CalMan bashing post. Actually far from it!
Quick spoiler. The LUT generated by LightSpace (as expected) is better than that of CalMan. BUT That doesn't mean the CalMan LUT is bad. Initial comparissons show little difference, although I am yet to view proper gradient patterns and a substantial amount of real content. I have noticed some subtle differences between the two where LightSpace definitely seems to come out on top. But whether the average viewer would notice without looking for them is debatable.
As I had just finished performing a profile/LUT from LightSpace, my meters/generator were still set-up and connected. So you can be sure that meter placement, enviroment, settings, and anything else you could think of was exactly the same for both profiles. I even used the Four Color Matrix Tool from the Portrait installation folder to import the exact same Probe Match profile from LightSpace to CalMan (which I had already verified was a good correction) so as to replicate the way patches were read as closely as possible. I used RPi PGenerator for patch generation for both profiles, with patch scales replicated across both software, and for pattern insertion I had to use a compromise to match between the two. LightSpace uses a full black patch between colour patches, CalMan uses a time based insertion. For LightSpace I use 0.35 seconds insertion between patches (recommended value for OLED), with is 1/3 a second (approx). For CalMan I used a 0% black, for 5 seconds inserted every 15 seconds (which again is 1/3 value). My meter is iDisplay Pro OEM, matched to an i1 Pro 2. My meter is mounted on a boom mic stand and is used in non contact mode and hadn't been moved, so the exact same placement for both runs. The Service Menu White Balance GAIN was pre calibrated with OLED Light 27 to D65 @ 123 nits with a 255.255.255 109% White.
For the LightSpace profile I had used ISF Dark Room, so I matched setting across to ISF Bright Room for the CalMan run as these two Picture Modes are identical except the are pre-set differently for dark/bright enviroments.
Basically, anything and everything was replicated to ensure as fair a comparisson as could be. One caveat is the fact that I haven't tried this by using the LG iTPG. All things being equal, there shouldn't be any difference using the LG internal patterns, but I guess it could produce differt results. I have no technical understanding of how the iTPG works, that will be for others far more knowledgable than I to decide or debate.
The screencaptures attached below show the 1D LUT completion screen, the 3D LUT completion screen and the Pre/Post Calibration screen from CalMan. The rest of the screens are from LightSpace. 3D LUT Cube Viewer screens for both the LS, and CM generated LUT's, and it will be fairly obvious which is which when viewing these. There is then a series of comparison screens using a CIE chart with filters applied to show dE ranges from 0-0.5/0.5-1.0/1.0-1.5/1.5-2.0/2.0-2.5. The final screen shows a data comparisson of the the two LUT's, with LS on the left and CM on the right.
Both Picture Modes, ISF Dark/Bright have all image processing off, and OLED Light 27. The difference in luminance, I guess, is due to the fact that with the LightSpace method, you skip the 1D LUT entirely and everything is corrected within the 3D LUT. CalMan does both a 1D & 3D LUT.
As you will see, CalMan results are more than acceptable. Are they as good as LightSpace? Not at all. Time will tell as to whether I can actually see this is content over time, and I will be checking.
Bearing in mind that I am only using consumer level home enthusiast equipment, LightSpace gives outstanding results that are repeatable time and again, and this has confirmed that it will remain the software of choice for me to do SDR 3D LUT's. But CalMan Home for LG, in my unscientific test with what can be described as budget meters, gives pretty decent results that should be acceptable to most.
Pro's with High end gear may well be able to squeeze more out of CalMan. I don't think I would be able to though.
I've tried to be as unbiased as possible, and hope some of this info helps others.