Hello,
im trying to make an old, rusted elevator, with rusted metal bars, but the texture isnt invisible in the holes of the grids, so it looks horrible
Can anyone help me please?
you didnt hook up the alpha channel of the texture to the mask or opacity slot probably.
Would be nice if you showed us the material setup.
what do you mean? Im pretty new to this sorry. what do I have to do
show us your material, then I can draw lines on it etc to help you understand.
Imgur: The magic of the Internet Its a PNG
hehe, thats a texture… not a material.
A material is this:
https://docs.unrealengine.com/latest/images/Engine/Landscape/Materials/Landscape_MaterialLayers.jpg
how did you set it up? 
öhm, i didnt make it a material 
http://imgur.com/a/PWvaO
But it still looks the same
First of all, read all of this: http://pastebin.com/Z1AficKB it will help you understand a bit more about materials, PBR (physically based rendering) and some theory behind it.
second: Connect a wire like the red line in this image:
And set the Blend mode in the “material” options in the “details” panel to “Masked”
now itll work.
Thanks alot!! An offtopic question: Is flowing water hard? Because I want to make some, and all Tutorials are found are hours long and super super hard