doh... typed out a reply.... had an idea... went to google it... lost my reply :-(
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I'm planning to build a really big tri colour led cube but I'm worried with so many LEDs the multiplexing will be too slowif I use a TLC5951DAP as an led driver it will give me 24 outputs with 12 bit resolution for brightness controlI'm thinking of building a 24x24x24 cube (13,000 led's)
Its certainly possible to do more complex things, but likely more processing power is needed:http://gajitz.com/a-bit-of-light-dancing-bizarre-3d-led-curtain-display/?ref=search&utm_campaign=googimages&utm_source=images&utm_medium=other