how is ist possible to set the background color for the scene ?
I tried :
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RenderPeer rp = new RenderPeerImpl();
CanvasPeer cp = rp.makeCanvas(null, 800, 800, 24, false);
Canvas3D canvas = new Canvas3D();
canvas.setBackground(Color.BLUE);
canvas.set3DPeer(cp);
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and / or
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Background bg = new Background(new Color3f(1f,0f,0f));
scene.addChild(bg);
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but nothing works

OK, I can put a sky box around, but this is a little oversized
for this little problem...
What's the way ? What's wrong ? Any tips ?
thanks in advance

,
Thomas