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Change the colour of a projector.
In the little tycoon game I'm working on for college I'm using a projector to show a grid around the object being placed. I'm trying to make it change colour from green to red when the object is being put in an invalid spot and visa versa but I can't find any way to change the main colour component on a regular light projector. The best I've found when looking online is people changing the material itself to brighten or darken a shadow, which won't work for this. I know it can be done through shaders but I have absolutely no idea how to do a projector shader. Any ideas on a simple way to change the colour of what's projected?
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