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As we’ve now added some specularity to the grey diffuse ball, if we were to sample the ball, it will more than likely be higher than 0.19, therefore, we recommend you dial down the baseColour value until the value in render equals 0.19.
As mentioned above, the aim of the game is to use the reference to calibrate our digital scenes to the photographic reference. To do this, we’ll need to build a digital twin of the physical environment (that is the best way anyhow) and then position the HDRI light sources into 3d space, matching the physical light positions. And if you are not matching to photographic reference, you’ll still want to standardise your setups, so your team is working with a calibrated and known dataset. script>
Explore their relationships
A possible improvement of this post could be to generate two charts : one for Diffuse Reflectance and one for Specular Reflectance. Sounds like some interesting homework for the future ! Links A Scottish nobleman hostile to Macbeth’s kingship from the start. He eventually becomes a leader of the crusade to unseat Macbeth. The crusade’s mission is to place the rightful king, Malcolm, on the throne, but Macduff also desires vengeance for Macbeth’s murder of Macduff’s wife and young son. The chart is commonly called “Macbeth,” owing to its original developer and manufacturer. Macbeth does not have a capitalB. I have been wondering for a while if there was any study on the Diffuse Color/Reflection and saturation. Until I found out about the Pointer’s Gamut. Most of my data comes from this great article. Why? Because, on most occasions, the Macbeth chart will have been shot under a specific lighting setup (the image you are seeing on the screen), and you will be existing in a different lighting setup (whevever you are in the real-world at that specific moment in time). So they will never match.
Field, Gary G. (1990), Color Scanning and Imaging Systems, Pittsburgh, PA: Graphic Arts Technical Foundation, ISBN 0-88362-120-7 So that’s it. Or that is how I use the Grey, the Chrome and the Macbeth chart. If you have other ideas, it would be great to hear from you. And lastly, before we dive into the nitty gritty, please do remember that capturing this data is no easy task. Life onset is extremely fast paced, so if you don’t get any fancy reference, think about what you could use in plate photography to help you decipher the shot. Maybe a nearby wall is close to being white, so you could use that for grading. Or maybe you can see some useful info on the reflections of a car window.I sometimes see shaders with the 0 value in albedo. I agree that the 0 value can be an optimization since there is no value nor bsdf to evaluate. But keep in mind that the 0 value would likely stop the light path in a RGB render engine. CG Albedo charts The above data has been provided by the wonderful team at Colour Science, so a huge thanks to them. If you can, I highly encourage you to support them, so they can provide us with even more fancy tools and training. There is a reason why so many colour-related headaches have been reduced over the years, and they, along with ACES Central, have been instrumental in pushing for consistency and standardisation.