Worldspace canvas backface culling

Hello guys,
I have a bunch of worldspace canvases and when i move around my world, I can see the backfaces of my UI. I am using a separate camera for UI in forward rendering as my main cam is in deferred and UI has a bug with deferred rendering.


Because of the separate camera, I need to have all worldspace canvases to be backface culled so that I won't see it (as you can see in above image, flat numbers on the other side of the building should be culled). Is there anyway to cull the backfaces of a canvas?

 

That is a curious one, I was sure there was a way but can't think of it off the top of my head

@phil-Unity @Aras Is this something built in or would you need to apply a custom shader to do it.

 

Yeah. Same Problem. I totally think that there was something like that during the beta. I believe in the Canvas Render. Can't find it now.

 

I just built a quick shader to solve the issue. It's basically just the UIDefault shader from 4.6.3 but with backface culling enabled. You can get it from here:

http://pastebin.com/YLiAieh8

 

Note that you also need to do this for any texts using the text shader. You can grab the raw shaders here:

http://unity3d.com/get-unity/download/archive

Simply change "cull none" to "cull back" and rename the shader.

 

That's what I ended up doing. Just went into the built-in shader and set the cull to back.

 

Thanks for this solution Martin. Any idea how to add this to the UI-DefaultFont shader in 5.3.6? If doesn't have a culling attribute that I can see. I've resorted to using the same default shader for both text and images and it seems to work fine, however I'm not sure if this is optimal performance-wise.

 

Sorry to necro, but this is the relevant thread... I want to do exactly this, but I can't figure out how to actually use a custom shader with UI elements. Can somebody clue me in?

EDIT: Never mind, you just make a Material and apply it to each UI element in the Inspector. Duh.

 

This shader works in URP! thanks a lot!