Hello, I’m having a very weird issue with some assets (2)… seems everything is ok, but in the light I can see trough them and get weird dots, while without direct light or in unlit mode they are ok.
This pics shows the same asset having the issue, in the shadows is ok while in the light have this weird transparency.
Any clues? I’m new to unreal engine 5.
Thank you!
Could you show the material graph of this Asset?
Sorry for the late reply. But this was the answer from the support from ScansFactory:
Hi!
Thanks for the screenshot and for letting us know about this.
The “dots” and transparency you’re seeing happen because Unreal Engine 5.4 handles older shaders differently. These assets were originally made for UE4 using the old Tessellation/Displacement system, which Epic has since replaced. Basically, the material is trying to use a Heightmap in a way that the new UE5 renderer no longer supports, and that’s what’s causing the glitch.
You can open the Master Material and disconnect whatever is plugged into the World Displacement or Displacement pins. This will make the mesh solid again (though it’ll be flat). If you need that 3D depth: You’ll need to enable Nanite on the mesh and set up the material for the new Nanite Tessellation (the system introduced in 5.3+).
I’ve added this to our bug list, and we’ll be looking into a proper fix that works with the new Nanite workflow. I can’t give you an exact date for the update just yet, but it’s on our radar and we definitely won’t forget about it.
Hope this helps you get back to work on your project!
Best,
Tom, SF Team
I noticed that it happens with other assets too, even without the transparency. The ones that doesn´t look with transparency have lots of white dots moving like ants, in the reflection of the light.
The level is almost done, and ONLY the assets from this pack is causing this issue. Replace them will be a hell at this stage, the best solution is to get the same materials/textures fixed to not change the enviroment look/feel.
Sadly I worked almost entired in the unlit mode, and didn’t noticed the problem until moved to the high quality settings to see how it really looks.
Never imagine that could have assets like that, when in FAB says it’s for 5.7 
I just asked ScansFactory to send me the updated assets, so I can just replace them in my level.
Cheers
