Shaders are little programs that draw a picture, pixel by pixel. With ShaderBlaster, use shaders on gifs and images to make new effects. Your basic variables are position (x, y), time (t), and color (r, g, b, a). Many math functions such as cos and sqrt are available, along with functions from GLSL like step and mix. You can see a full list by clicking "commands" above. Click "images" below to search Dumpfm and Photoblaster for images, or enter a URL at top left. If you make a cool effect, you can render it out to a gif, or save the shader for others to use.