this patch tries the following:
1. rendering of a torus with jit.gl.node and capture the texture with jit.gl.camera
2. using jit.gl.videopane with this texture and render it with a second camera.
3. simultaniously share the texture with another context and display it in a different window
now: when I move the second camera (render step 2) it changes the lighting situation in render step 1. It actually feels as if the second camera is setting the default light position of render step 1.
does anyone know how I can stop this happening?