The Search for the blackest black - How BLACK is the BLACKEST PAINT?
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- Опубліковано 11 лип 2024
- This video is the result of my search for the blackest BLACK.
The outcome of this research is
- finding a value we can safly use as a BLACKest color value of PBR materials and textures we create for CG art.
- getting some options for background separation improvement which can be useful for photogrammetry and photometric stereo capures.
- finding can we can set the blackest and more light absorbing substances on fire just by illuminating them with a camera flash light.
Since I consider these PBR values as quite important for PBR material creation, I added them to my PBR Color Reference List:
gbaran.gumroad.com/l/rjthlk
Big thanks to all of you who purchased it already, as it really helps to co-fund this research and keeps adding more samples like these.
If you like this type of content, and would like to see even more like this one, please leave thumbs up, drop a comment and subscribe to my channel.
Cheers!
G.
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00:00 Introduction
02:10 Spoiler Pre-Summary
02:50 The plan
04:14 Selection of Samples
08:22 Sample preparation - 1st failed aproach
11:14 Sample Measurements
15:28 Defining level of Blackness
16:45 The results comparison - the 1st approach
18:36 Preparing samples the rigth way
21:37 The final measurements
22:41 Visual blackness comparison
22:43 Glossiness test
24:57 Spectrometer Measurements
31:57 Blackness Comparison
35:18 Durability Test
36:29 Final Verdict
38:26 Fire Test
42:30 Final Summary
#musoublack #blackestblack #theblackestblack #nix #spectro2 #colorspectrometer #colormeasurements #substances #textures #substancedesigner
![Мифы, в которые мы верим #17 [ПИРАТЫ]](http://i.ytimg.com/vi/nVWFOtzL7ok/mqdefault.jpg)
32:15 The Autocorrect did you dirty...
*Museum Black* LOL 🤣😂
Yeah, good spot. I fixed that later on a dashboard :D
Glad to see another video from the scan man himself. Great work!
Thanks. Hope the subject is interesting and enjoyable. I initially planed to keep it much shorter but I failed :)
@@GrzegorzBaranArt honestly i cant speak for everyone but the longer GB video, the better ;)
This is the most complete comparison on black paint that cover many aspects such as coating issues, reflectivity, glosiness with a scientific oriented approach. Well done!
Thank you
This is a really helpful video for both my theoretical understanding and my photogrammetry efforts! Thank you!
Thank you
seeing that coal so close to the checkerboard was stressing, thanks for taking those risk for us!
:D
Awesome stuff Grzegorz! 🔥
Thank you for sharing! ❤️
Didn’t know you’d like to set things on fire that much 😂
Hey dude
Wow❣️Amazing journey an super details. Thanks for you❤
Thank you
Very interesting, thanks for sharing! I think the paper might not have been ideal due to its surface texture and there could be some uncoated fibres sticking out. A printable transparency sheet could be a better surface and it would also show if the paint coating is still transparent or thick enough. A final gloss coat would make all tested coatings comparably durable without affecting the blackness.
Hey, to be honest I didnt consider this option as I wasnt unaware of that, so thanks for the advice, very appreciated. I consider some different options tho.. I chose to use standard paper because it's something everyone deals with on a daily basis. I was hoping that a double coat of paint with enough time to dry would alleviate this problem to the point where the base surface wouldn't matter much. I was also considering a solid, smooth surface instead that the paint wouldn't soak into, but I found somewhere that solid surfaces are not recommended for some of these paints because they may have adhering difficulties. Finally, I considered measuring the paint itself using a liquid measuring adapter, but I decided that the method of my choice would be the most representative. Its definitely something to improve tho and consider in a future and to be honest, I might give it a try even just to see the difference. Cheers!
Crazy detail :)
Thank you
well done mate! really good video
Thank you , very appreciated
Awesome video. Super detailed and very well explained in great detail. Thanks for sharing
Thank you Barnyz, verry appreciated
Really getting into the science of it well done! learned a lot. Have you tried using a 400w flash on the black paint or coal? What if it was put through a magnifying glass or lens? Thank you for always sharing your processes and findings. I'm a game art student that started photoscanning in part because of your tutorials, please keep up the great work!
Thank you. Nah, I havent but AR400 flash ring I own spreads the light widely while AD200Pro focus it on a small area. I am sure even the coal can be set on fire this way as the smoke we see already proves that combustion took place. Magnifying glass would just focus more energy on a smaller area therefore multiply its intensity, so I am 100% sure that this way I should be able to provide enough energy to ignite any, even white paper surface.
I really liked this video. Maybe you can do a video on the greyest grey?
like for an optical grey option to make our own reference material :)
@@rossisbudda Thanks. Anything between black and white can be considered as grey ;). The next video I am working on is about the search for the whitest WHITE (here is the video announcement: ua-cam.com/video/S5jxYZEokeE/v-deo.html ) I also plan to cover phenomemon of artificial optical brightening there.
Unfortunately I am still at sample collection stage - thanks to some companies I managed to get some of the whitest substances on Earth already. I basically have everything I need except the last substance - White 2.0 paint from Culture Hustle - as they claim for it to be the whitest white paint available. As you can see in this vide, their Black 4.0 except being the most expensive, definitely isnt the blackest one as they state. Wondering is this the same case with their whitest WHITE. I ordered it over a month ago with the next day delivery, but still waiting :(
Thanks a lot, Grzegorz! I wonder why these Nix spectrometers do not provide the values in the linear space initially (I have never had one, but I think it would be more logical for a pro tool).
In the case of coal powder: I suppose it just spreads the light down through the coal thus causing more light absorption. You'd have to press it really hard to minimize the space between the pieces.
Linear vs sRGB is just a math conversion and linear color information to be honest is quite useless when it comes to digital color representation. So my guess would be that these spectrometers and colorimeters were designed with print/ink/paint measurements and computer screens in mind, therefore sRGB makes more sense in such case. The PCE2 I used to use, outputs linear values and it was painful to convert these into sRGB to get their digital color representation before I was able to apply them - I had to take measurements, put them into an excell file with conversion equation there first .. now I just make a measurement, take a quick look on a screen and apply these results to my digital app - usually Substance Designer - in no time.
When it comes to color comparison or accuracy, it doesnt really matter as the app also outputs color information in way more accurate formats like CIELAB. I am also aware there are some color convertors on their webpage which would be cool to have in the app too but I didnt notice them there.
Luckily, when you store the data through app - like I did in this video - you can access it automatically on your computer screen from any computer automatically through their dashboard (dashboard.nixtoolkit.com/) and simply export whatever you need in CSV format, so any conversion of these are quite easy for anyone who might need that.
So I would rather prefer sRGB to Linear, but I totally agree that it would be cool to have a choice/option for such added somewhere to the app.. unless it is there already and I just missed that.
@@GrzegorzBaranArtYou can display the data in XYZ and Y is your linear luminance
Musou Black to już prawie jak Vanta Black :o
Niestety nie mam dostepu do Vanta Black zeby porownac - nie mowiac juz o tym ze 'vantablack requires professional spray systems and training to apply' :)
That pillow burn scares me a bit. Do i have to worry about it when scanning hand towel and such with a Godox AR400?
:D
I dont think so, at least not as long you keep the distance from the subject - as you can see on this video I intentionally positioned the flash very close to the surface. Not to mention, while AD200 Pro I used outputs 200W, it focuses the light on quite small area while AR400 spreads its 400W on much larger/wider one. I just wanted to show that light absorption is directly related to temperature.
In the video about 'whitest whites' I am currently working on I set a black paper sample on fire with the magnifying glass and the sun just within a second while I wasnt able to set a white paper sheet on fire at all no matter how long and what I did. Still not sure if this part will go into the final video but actually might :)
So if you want to scan some black insect using macro lens and use some strong flash light from close distance to illuminate it, you can actually burn/damage the specimen. But if you use standard lens - which needs at least 20-30cm of distance from the subject to even get focused on it, it shouldnt be a problem at all. And even if the subject gets warmer, it wont ever get hot enough to ignite :).
@@GrzegorzBaranArt Good 😅 Thanks for the detailed answer. Glad i am not interested in captureing insects haha
Może coś o skanowaniu 3d z nowym CR-Scan Ferret Pro 0,1 mm. Mogę podesłać do testów.
Tell me please, does the Spectro2 device measure reflection equal to "=" albedo + specular reflection or does it still separate pure albedo without taking into account specular reflection (IOR)?
I want to understand whether it is worth subtracting the reflection coefficient from the obtained values in order to obtain the diffuse component...
For me it’s a matter of life and death, to understand, I can’t sleep peacefully until I know the answer, I’m tormented :)!
Hey, all Nixsensor devices: Spectro 2 but also Mini3, use a 45:0 measurement geometry (incoming measurement light at 45 degrees, sensor at 0 degrees). This will exclude the specular reflection component from the measurement by design.
@@GrzegorzBaranArtI am very grateful that you paid attention to my question! Thank you!🤝
@@a.l6515 You are welcome :)