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Night & day cycle

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I've used a little trick: I've placed, at the highest Z level of the canvas, an image that cover all the game area (is a blue semi-transparent png).

The default alpha value of this image is zero.

Using a timer, the alpha value increase. So I simulate the incoming night (it's like the blue filter used at cinema). The day arrive when the alpha value decrease to zero.

I hope my trick could be useful for you.

Bye, Alex

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