EvolverInteractive wrote:Video for when the normal map is flipped

https://youtu.be/BvwKR-R_thI

Thanks for help!

ChrisHekman wrote:

amadudkin wrote:i use Unreal Engine 4.23.1 and Octane Prime 0_24_UE4_23 (the full name of my octane installer)

Could you try the latest version? I made a couple of changes related to normals in 0.25 or 0.26 i believe.

viewtopic.php?f=132&t=73502

Thanks, it works!

i use Unreal Engine 4.23.1 and Octane Prime 0_24_UE4_23 (the full name of my octane installer)

I found the Quixel material you are using.
Seeing as the material is upside-down, am I correct in that you are scaling the model with a negative scale?

No, I initially checked the directions of all the normals of my object, they are OK, upside down doors-this is my UV mapping error. In addition ...

The solution has already been given, in that some DDC for the green channel.
1. Get both Unreal and Octane going the same direction (even wrong)
2. Add to the normal node, a float value and a flatten normal
3. Adjust value positive or negative for best results.

It seems that this is too ...

I found the Quixel material you are using.
Seeing as the material is upside-down, am I correct in that you are scaling the model with a negative scale?

No, I initially checked the directions of all the normals of my object, they are OK, upside down doors-this is my UV mapping error. In addition ...

I 100% has the same problem, with certain normals get unreal to flip it so, both are wrong then either add a float negative value or a minus one node

Yes, inverting a green channel works really good, but some of my projects need both renders, realtime render for a comfortable work and ray trace ...

When you import normal maps, especially from Substance files or Polligon the green channel is flipped. Go into the normal texture file and click flip green channel. Unreal will then display the correct same direction.

Add a flatten normal node and a float value to adjust.

Yes, i know it, but in ...

Could you show me an example? Or share the model and material you are using?

yes sure, i use megascans library, here are screenshots of my problem, will they do? https://sun9-41.userapi.com/c206624/v206624452/30d2f/Q9fCmffjkrU.jpg https://sun9-52.userapi.com/c200624/v200624758/2ff04/mTTpCvC817A ...

Hi! In my UE4 viewport my normal maps work correctly, but if I try to render my scene with octane - my normal maps are flip. How can i fix it? UE4.23