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I would imagine excanvas would struggle with this... however..

If Yury hasn't already, definitely give it a shot with FlashCanvas: http://flashcanvas.net/ Its performance is somewhere around 33x faster than the vml-based excanvas. (Yes, 3300% better.)

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I get why that would be the issue for IE <9, but the latest preview version of 9 has canvas support. Hardware accelerated, even.

My guess is IE 9 doesn't supports the 'lighter' globalCompositeOperation on the canvas which is key to making the effect work. Without it I bet the lines look pretty dull.

As it turns out, it works pretty well with the latest IE9 Platform Preview, long as you switch IE's user-agent to one of the supported browsers. I think you're onto something though, because it does look less shiny in IE than in Chrome.

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