I'm trying to do some experiments with GL 3D on OpenFL. I started from the HerokuShaders example . I am trying to setup a basic cube. So I increased the glBuffer to 36 vertices and increased the count in the draw. So far it looked ok. But because it's square on I cannot tell if it worked. So I figured a rotation about y-axis by a little bit would help. But that fails completely. I built a 3D rotation matrix and converted it to a Float32Array as required by gl.uniformMatrix4fv. But I just get a blank window now. I tried copying the matrix data to the vertex shader directly but same result. So the question is: is 3D possible here ? Am I missing something basic ? I could not find among the samples a 3D example to start from.