How do I change the texture for the floor shadow?

I haven't seen anyone before trying to do this. For most cases the EA reference shadow sheet is enough to do it as it also makes it constant with the appearence of the rest objects in game. The dropshadow map is referenced in the LODS. I've never tried and I have no idea how this would result in game, but you can try to add a new diffuse image to the .package and reference it in the LODS (Model Lods, except the shadow lods of course). Remember to do it for all LODS (Also might be referenced in the Model resource). Pretty much like THIS tutorial follows for the dirty overlay. This is experimental and I'm not aware if it could cause issues in the game, but you can give it a try if it works at all.

I don't have the AlphaMaskThreshold:



I can only presume it's under material, because when I've tried to edit all of the other options I don't see anything much at all resembling what that screenshot has.