Suggestion for new version

[Foozey]

 I'm sure you've thought of something like this already, but perhaps in the new version when you get around to it, you could make it fade in/out a red overlay which is layered on top of the item being rendered on the ground. I'm not sure about the technical side of this, but with this solution, you might be able to avoid modifying the actual rendering of the item, since you're just overlaying a colour on it instead?