I still think you'd get much, much better results by simply placing a tree between the light and the object. It would take a very small fraction of the time too.

Gels are normally used as a workaround to get things faster, like, for example, simulating blinds in a window instead of making the actual blinds. Or simulating caustics, instead of spending a long time rendering real caustics. Using a gel for simulating branches and leaves could make sense in a software package that doesn't have trees natively, like Poser. But using it in Vue it's like using 2D painted backgrounds in Vue, IMO it doesn't make sense.

But hey, each to his own! :-)