It's an extremely clever idea, btw Ondra. 10 bonus points awarded.
Thank you very much for the compliment, sir.
The idea was inspired by Sergey Mertens, a few months ago he explained me the "colour perception" from the artistic point of view and that brought me to this.
The very initial intention was to use a sandwich of yellow and red sheets - you need warm colours as brown (which is the final colour you wish) is a warm colour too. Unfortunately, I have not found a proper source for styrene sheets in the colours I need. That's why I had to use black and white, even for the black styrene I have to use coffee-to-go caps.
Actually I broke all the rules Sergey explained me as I am using cool colour (white) under warm colours.
To WarrenD: If you want to try this method, I can really recommend you to search for yellow and red plastic sheets, the result will look much better. I you are fortunate to find a place to buy them, would be great if you could let me know.
