Having the alpha channel hooked up to both diffuse and opacity might be confusing the material editor. I've found that if the diffuse's alpha channel to opacity or opacity mask doesn't work, I just save out the alpha map as its own separate map and it works fine. What does your alpha map look like? It looks like a part of…
I am not sure what is causing this but every time I put my alpha of my texture to opacity its giving me weird see through splatters on my static mesh. This one is with only alpha map on diffuse channel http://imageshack.us/f/594/udkweird2.jpg This one is once I connect it with opacity…