Why is the add node not working as expected in shader graph?

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Hi, I am writing shaders in LWRP and I noticed that the add node is not working as expected in Shader Graph. I noticed this when trying to copy shaders I wrote a whole ago using Cg shaders to similar ones using Shader Graph.

I am only able to make two attachments so an example of the shader graph can be found in a post on the unity forms:

https://forum.unity.com/threads/why-is-the-add-node-not-working-as-expected-in-shader-graph.767807/

Here is the result of a white radial gradient added to a background color: alt text

However, here is what is expected from adding the two layers: alt text

Anybody has a clue on what's going on here?

Answer 1

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Answer by RadonRaph · Oct 27, 2019 at 09:53 PM

Hello @Jonathan_L , I don't know why it doesnt work has expected but i think you can use the power node to make the same effect.

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Jonathan_L · Oct 28, 2019 at 01:53 AM 0

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Yep, got the same exact effect by using power nodes to converting colors to gamma space, adding, then converting back to linear space. https://forum.unity.com/threads/why-is-the-add-node-not-working-as-expected-in-shader-graph.767807/

Answer 2

Answer by Jonathan_L · Oct 28, 2019 at 01:10 AM

Turns out I was working in linear color space instead of gamma space like the other project I was working one. I'm trying a series of power and multiply nodes to get that same flow effect and I think I'm getting close to that same effect @RadonRaph. Thanks

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Why is the add node not working as expected in shader graph?

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