I noticed that the 'Flat' option in the interpolator node has no effect on the render target. Or did I miss something ?
In picture 2) I recreated the Lens Studio material from picture 1) in a GLSL app. Without the flat qualifier, the two triangles result in a gradient.
In picture 3) I have activated the 'Flat' option in the Inerpolator Node in Lens Studio. But there is no change.
Actually, the triangles should now have a solid color, like in the GLSL app in picture 4).
Any ideas? (Pictures 1-4 in Post below)