How to make materials (especially roughness) look like in Substance Painter (where they were created)?
Substance
And Blender
Have you switched the Color space to ‘Non-Color’ or ‘Raw’? (on the node of the roughness texture)
Of course i did
Hmm, that’s odd.
So no color space issues.
Usually there should be no problem at all when using materials from Substance.
Either one forgets the color space, or the normal map could be effed, or some weird shading glitch with custom normals can make you scratch your head for a while, but this does not seem to be the case here.
Sorry, I am running out of helpful ideas.
Doesn’t it look like the UVs are off ?
Hi,
My Workflow SP > BLENDER (Maybe this will help you better understand… 
)
-1) My Preset in SP
In BLENDER:
- activate the Node Wrangler addon.
- apply a base material to the object.
- in the Shading window, select the Principled BSDF node and press CTRL+Shilt+T
- In the window that opens, select all the textures created under SP > Click OK.
Automatically, Node Wrangler will import and create all necessary nodes with the right settings… 
SP has different lighting and HDRI…try to setup a brighter similar HDRI in blender to get closer result… yeah also set your B&W textures to non-color data…idk your plastic material looks kinda translucent in blender? so yeah basically play with the lighting/HDRI and you kinda get the result…
I know this is an old topic, but I just had the very exact same issue and I fixed it—you have to set a Specular value, otherwise it will not reflect any roughness map.
Edit: Seemingly, he reason for this is that when you export the mesh from substance, for some reason the default Principled material that gets in Blender on import has a default Specular of 0, whereas a new material has one of 0.5.
Thank you so much! I was looking for this over a week and im also surprised almost nobody noticed this topic.