On Mon, Nov 11, 2013 at 2:05 PM, Greg Bennett <gwbennett at sentex.ca> wrote: > glClearColor(1.0, 10., 1.0, 0.0); > glBlendFunc(GL_ONE, GL_ONE); > glEnable(GL_BLEND); > (gl:clear-color 1.0 1.0 1.0 0.0) ;; assuming 10. was a typo (gl:blend-func :one :one) (gl:enable :blend)