Double Sided shader for mobile?

salimmatta · Dec 2017

Hey guys,

I'm a game artist and I always used UE4 for our games. But lately we have been using Unity for mobile games and to be honest, Unity is very limited for artists. However, I'm creating a turn based strategy game scene. I have wall models which are basically planes.

Is there a way to make the material (shader) double sided? Because I don't want to increase geometry for such a model.

Kind regards

.Wiki · Dec 2017

Just duplicate the polygon and invert the normals. This has exactly the same effect as using a doublesided shader.

salimmatta · Dec 2017

Hey,

Thanks for your help mate, any idea if that technique might be expensive for mobile? again I'm an artist, so my dev knowledge is pretty limited

Cheers

Mehran Khan · Jan 2018

AFAIk, A sided shader would be far more costly than having a custom set of duplicate faces only at the right parts. The reason being that if you use a 2 sided shader, you are doubling your face/tri count across the board, where as if you just add inverted faces/tries only at the places where you want them than you are only paying for those extra faces and not all the faces in your mesh.
I could be wrong though but that is how I see it.

Eric Chadwick · Jan 2018

.Wiki and Mehran are right, better to duplicate & flip.

One (rare) reason you might want to disable backface culling is if you want a light-transmission effect. Backlit leaves for example.

salimmatta · Jan 2018

Eric Chadwick said:

.Wiki and Mehran are right, better to duplicate & flip.

One (rare) reason you might want to disable backface culling is if you want a light-transmission effect. Backlit leaves for example.

that works perfectly thanks a lot.

Double Sided shader for mobile?

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