Tutorial: Paint Brushes, Trailing Object Effects, and More with the Snapshot Canvas

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Graphics 2.0 Demo Contest Winners

Today, I’m going to show you how to use snapshots to achieve the sorts of tricks you’d want to do in traditional CPU-based graphics.

One of the old school tricks is to be able to touch pixels on the frame buffer directly, or modify the pixels of an image directly. In a GPU world, you cannot do that b/c passing memory between the CPU and GPU is extremely expensive.

Snapshots to the rescue!