X-Rite MSCCC ColorChecker Classic, color Rendition chart, 8.5 x 11 Inch

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Here's asubtlety concerning colour reproduction. Everyone documents the colours that are produced from the chart under whatever illuminant you use. But imaging systems almost invariably introduce tone and colour mapping to make images look right when displayed (as is usually the case) much less bright and with lower contrast ratio than is typical at capture. When captured or reproduced, the luminance and chromaticity values should not be expected to match the camera's or scanner's stimuli! For more about this, see Macbeth, the war hero of Scotland, meets three witches on a heath and receives a prophecy that he will become Thane of Cawdor, then king. After the first part of the prophecy is fulfilled, the new Thane of Cawdor is certain that he will be king. Fighting his conscience, he devises an evil plot to seize the position. This causes a series of events that make up the plot of Macbeth. When the drunken porter of Macbeth's castle finally responds to the noise, he opens the door to Macduff, a loyal follower of the king, who has been asked to awake Duncan in preparation for the return journey. Macbeth indicates the location of the king's room, and Macduff discovers the body. When the murder is revealed, Macbeth swiftly kills the prime witnesses, the sleepy guards of the king's bedchamber, and Lady Macbeth faints. The assembled lords of Scotland, including Macbeth, swear to avenge the murder. With suspicion heavy in the air, the king's two sons flee the country: Donalbain to Ireland and Malcolm to raise an army in England. So all good and as expected. Now, please do remember that the mid-grey value of 0.19 should be the result of both diffuse and specular reflection. So, we will modify the baseColour value to compensate for this. Comparing the Renders in Nuke Having never done any real-life measurements myself, I’ll just sit and listen. Here’s the final part :

This Grey ball used by Clear Angle Studios is very grey by the way. It’s an example of a fancy grey ball 😉

The chart is commonly called “Macbeth,” owing to its original developer and manufacturer. Macbeth does not have a capitalB. The problem you may face, however, is when you light a surface with a light narrow band. You find yourself in a situation where even if indeed your surface is smooth it reflects something narrow-band. So you can end up with a super saturated surface (it often happens in concert for example). And sometimes (often) it doesn’t go as we would like, e.g. blue highlights fix. I just love Thomas’ concert example. So visual ! The system is not made to stop people from doing their job, but to help them do it better and faster.

Norwegians, aided by Scottish rebels, have invaded Scotland. The Scots successfully defend their country and their beloved king, Duncan. One Scotsman in particular, Macbeth, Thane of Glamis, distinguishes himself in fighting off the invaders. After the battle, Macbeth and his friend Banquo come upon the weird sisters, three witches who prophesy that Macbeth will become Thane of Cawdor, and one day King. They further prophesy that Banquo's descendants will be kings. The men don't at first believe the witches, but then learn that the old Thane of Cawdor was actually a traitor helping the Norwegians, and that Duncan has rewarded Macbeth's bravery on the battlefield by making him Thane of Cawdor. Macbeth immediately fantasizes about murdering Duncan and becoming king, but pushes the thought away. Later that day, Duncan announces that his eldest son, Malcolm, will be heir to his throne. As Macbeth begins to succumb to his ambition, Duncan decides to spend the night in celebration at Macbeth's castle of Inverness. 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. Malcolm’s army approaching the castle and the battle (when Dunsinane is sieged) is the climax of the story.

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Studios have provided different answers to this issue : how do we limit the albedo range to a PBR one ? Here is a couple of solutions I have seen : I’ll share here a few values here so you get a rough idea if they’re inside the Pointer’s Gamut or not. But let’s not be too dogmatic neither, since everything is “wrong” in digital RGB scene rendering… Colorspace 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. What you need to change is the lighting. Our shaders for the spheres should stay consistent. And now we can see our balls! Great. But now you might say: It seems to me that nobody has worked on them like Sebastien Lagarde from Unity. In 2013, Sebastien was already talking about their use and their limits.

So to summarise, your reference will respond to your environment. And this is key. This is the info you need to capture. You are capturing how these known objects respond to light in a specific moment in time and space. Don’t mess with your digital shaders to try and compensate what the light is doing. Build known digital shaders, created in a controlled environment, and then let them respond to light as they should. But ideally, our v001 published ‘look’ and ‘light rigs’ have been calibrated. Whether that be for VFX, full CG or games. From that point onwards, you can be as creative as you need to be.

Play Act 2 Scene 2

On the odd occasion, it could be that you are lit in the exact same lighting environment as the image of the Macbeth chart (especially as we head into more immersive experiences and shoot conditions) but until then, DON’T DO IT!