interesting. I was expecting you to have issues because of compatibility, since these effects are made for forward+/mobile. If you're okay using compatibility, then all is well, but I'll have to say that the effects might have other issues/work differently due to compatibility using a different rendering pipeline.
Either way I'll ask just in case: which version of Godot are you using and what kind of specs does your computer have? If you're uncomfortable telling me your specs, you can give me general idea of the age/if it's low-high end.