Nice complement to the fragment shader-based http://glslsandbox.com http://glslsandbox.com and https://www.shadertoy.com https://www.shadertoy.com It would be

Nice complement to the fragment shader-based http://glslsandbox.com http://glslsandbox.com and https://www.shadertoy.com https://www.shadertoy.com It would be nice if it was possible to select the point shape, e.g. to get a circle instead of the default square.