I've been meaning to do this for a while now after adding these details on creating custom bokeh to my photography "must do" list. As with most of my photography intentions, it sat around without any further action, that was until Flickr reminded me about it and we co-incidentally happened to have an empty cereal box at home.
So last weekend I set to creating my own custom bokeh with a craft knife and a ruler and these are my initial results...
Pretty impressive. All I need to do is find some good subjects to focus on in the foreground and use an appropriate bokeh for the background lights and we could be in business for some pretty impressive pics. I also need to find a craft shop that doesn't package up their punches and allows you to "try before you buy" - I can then take my own bit of card and get all sorts of fancy shapes for free 
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There are some pretty good examples of pictures taken with a custom bokeh on Flickr and also in the comments here.
{ 2 Comments… read them below or add one }
Hi love - This looks WAY KOOWAL, but not exactly sure what ya trying to do ...
Well, I'm trying to change the shapes of the blurred lights in the background. Normally these are round, or hexagonal. Now I'm changing the shape to compliment the picture