Question Global variables in the Shader Graph (URP/LWRP)

I'm trying to figure out how to get global variables to work within URP.

I've tried setting a variable in the Shader Graph and then setting the reference name doing something like this:

Code (CSharp):

1. Shader.SetGlobalFloat("Vector1_71B9E5F1", currentFloor);

Nothing seems to happen though, so I'm guessing that would have to be done on the actual material instance?

I've also tried something like

Code (CSharp):

1. Shader.SetGlobalFloat("_GLOBAL_FLOOR", currentFloor);

, and then setting it in .hlsl code (something I'm not very familiar with). But if that is the way, then I don't think I know the correct syntax. I've tried a bunch of variants of the below without success:



I've also tried changing the reference string of a property to _GLOBAL_FLOOR, but that just made unity instantly crash to desktop when I pressed 'enter' in the field.

I'm running out of ideas, and I haven't been able to find any solution that seems to be Shader Graph compatible.

 

I tried both. I'll give it another try though.

Should I ever change the reference reference ids? (Vector1_71B9E5F1, f.ex.). I did try changing them before (to EnvironmentAlbedo f.ex.), but it resulted in my editor-chain-crashing until I manually edited the graph file to remove the input and all references to it within that file.

When I set the property, do I have to set it on a specific GameObject, or can I set it globally for all of Unity? I'd prefer to do the later, because my gut feeling is that running Update loops on every single game object with a material (to set the variable on it) would be terrible for performance.

With all that said, while I'll probably need global variables later regardless, this particular problem might be better solved with some sort of occlusion. What I was really trying to to was:
A) Hide roofs/floors/above of buildings when the player enters them (3rd top-down person game) / hide ground, etc. when going into a basement.
B) Black-out or perhaps cull the world based on whether or not it was visible to the player object (not the main camera, the main camera is a top-down one)

 

I got a similar issue, i have to use the reference ID and can't use the custom name i set for my vector1 otherwise the setglobal doesn't work, it's not really nice because i got 2 differents shader so instead to use one global name i have to got to different reference in my script

 

You can change the reference ID, you should make them match so you're only using one keyword slot.

 

Thanks you i didn't know we can change the reference ID without any issue with the shader graph !

 

Turning "Exposed" off worked for me. 2020.2

 

How do you turn "exposed" off if it's not there? I'm using the URP Lit Shader Graph, and whenever I add a property in the blackboard, I just see the name and type, but there's no "exposed" option or anything else (no option to add defaults either). When using the VFX graph I do see the "exposed" option.

I'm trying to make a snow system that shades my simple low poly world white when snowing, and I want to control this effect from C#. I had it working in 2019.4, but now I have to re-do everything since I moved to 2020.2 and had to use URP for our project.

 

I'm so stupid! Just click the "node settings" button to see the node properties!

 

Thank,dude