Una Kravets walks us through blend modes, gradients and CSS filters in this excellent talk from dotCSS. It’s especially interesting to see how some of these cool tricks might let us circumnavigate design tools completely so that we can let the browser do all the work for us.
She also has a six-part blog post series on CSS image effects (vintage washout, 3D Glasses, Vignettes, Bokeh, Lomography, and Infared).
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[Talk] Editing Images in CSS is a post from CSS-Tricks