Well, using a million colors when 6 do the job, THAT I don't understand. As you become more skilled you learn to use less colors and less pixels but a challenge like this really speeds up the process. You have to learn first how 2 colors interact, then slowly build up. Also there is style involved here, sometimes you go for the simpler look given by a few colors. Great work!
If you read the explanation for my thingy (maya ruin) you would see it was for a challenge organized on pixelation.com . The goal was to create a piece about a Maya ruin with only 6 colors. As a way to get a feeling for colors and how they interact with each other. I'm not a big fan of it either but it's good practice.
I dont understand why someone would purposefully limit colors to make a decent PA look really crappy. Most systems now days have no bit limits so I don't understand why people do it.
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That's tripy.
The people are soo small!!