1 No caustics or anything, just one spot light
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2 Aother spot light used only for the caustics
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3 Decrease accuracy, change the Radius
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4 Change the refractive index of the object
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5 Change the Cone angle and the position of the Caustic light to get a more accurate render
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6 Changed the material property to blin, tweaked the values to emulate a metallic object
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7 changed the colour of the object
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