UV mapping different on iPhone

Unity Engine
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1

I’m having some difficulties with a shader I’ve made in Shader Graph
The shader uses Triplanar mapping to get a texture to stretch correct over a bunch of child objects. It works really well in the editor, but on the iPhone there seems to be some differences on how the uv’s are read (or something, I’m pretty confused to what’s actually happening)

Here’s how it looks in the editor:

And here’s the same view on the iPhone

Here’s the graph

And the custom node

Is this a bug on my side, or is it a general shader graph thing?

2

Anybody?

3

What’s that triplanar texture node from? I don’t recognize that one.

4

I just realised that Unity post’s an error that might be related

Shader error in 'hidden/preview/TextureTriplanar_B7D2D48': undeclared identifier 'Unity_Multiply_float' at line 87 (on glcore)
5

Here’s the texturetriplaner sub graph

6

That shader graph image is very small so I can’t quite make out everything in it, and I have no idea what that TextureTriplanar node is doing as it’s not part of the built in shader graph node set. There is a triplanar node, but it’s very different. That looks like it might be a sub graph. If there’s an issue, it’s probably there.

7

You are right, it is a subgraph, I’ve uploaded it, but for some reason it needs to be approved by a moderator.
But there’s really not a lot going on in there anyway. It’s just feeding some uv values to a sample texture.

8

Honestly, I can never get subgraphs to work. They always throw errors that are impossible to diagnose, even with the simplest setups.

9

ok, I managed to fix it through trial and error.
I was setting some shader values like this

_materialInstance.SetVector("_rotation", r);

when I changed it to

block = new MaterialPropertyBlock();
block.SetVector("_rotation", r);

it started working on the phone.

I still have no idea to why this would make it work