Depending on the type of camera you have, DSLR for example, you can get star filters that add the effect right to the image before the camera captures it. There are other ways to get a similar effect in camera, most require that you use a small aperture setting, larger F number like F16 or F22, this also gets you a larger depth of focus.
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Roy
Hot glass does not crack.
Unless it is glowing and drippy, hot glass looks like cold glass.
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