Substance painter -> Ue4 opacity problem

Oqtopus

Hello guys , iam very new with both the programs but iam starting to get a hang of them. but i do have a problem

opacity.

so what iam doing at this point is my substance painter with opacity like this :   

( show from back so you can see its opacity )   

then export using the unreal engine 4 package ,then import it , link up the material and put the material to translucent but it somehow turns out really weird

its somehow not bringing along the diffuse map like its supposed to look, any help on how to fix this would be greatly appreciated. i know iam doing something wrong but iam not sure what

this is how it looks if i dont try to make it transparant

 

musashidan

You have no opacity input. Opacity in the translucent material is transparency amount. Did you add an opacity channel in SP?

Oqtopus

oh that was silly of me , i do have now but somehow it turns my whole door transparant even tho everything is black except for the windows on the opacity map ? 

http://i.imgur.com/wBzqBBY.jpg

Edit:  i have fixed it by making the windows a separate object but id still like to know the " good " way to do this

Jerc

make sure you add a fill layer at the bottom of your stack with a white opacity color, if not, parts that you didn't explicitly make transparent will be black (empty) and fully transparent in UE4 too.

musashidan

Sorry, I forgot to mention that UE has issues with alpha blending transparency. (as you've discovered) The easiest way around it is to set up your window with 2 mat ID's in your 3d package and assign 2 different materials to the object in UE - 1 as the window frame and 1 as the glass.