How to do billboard shader with Shadergraph

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Hi, I'm having trouble with creating a billboard shader with shadergraph. It is for a simple quad with a texture and I want all axis to align with view, so it should look exactly like a particle with view render alignment.

This is what I got so far. In general it seems to work, but the object is rotating a little bit (and sometimes scaling, depending on the view direction), if I rotate the camera when near the object. Anybody know what's going on here? What am I doing wrong and how can I fix it? Thank you.

Answer 1

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Answer by insominx · Apr 17, 2020 at 11:47 PM

Here is a subgraph solution I made based on the work of Unity forum user bgolus. An explanation is given at the top of the group boxes. alt text

capture.png (206.8 kB)

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bzankl · Apr 29, 2021 at 05:49 PM 0

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I've tried a lot of approaches and really want to get it to work. One question regarding this one: I always get "'cross': implicit truncation of vector type" when I try to use this as the vertex position, the typical workarounds don't work for me. Do you have any ideas on how to solve this?

Answer 2

Answer by terraKote · Jul 30, 2019 at 11:13 PM

Hi, to fix rotation you need to do to this. alt text That's because you're using Quad. It doesn't use the same axis as cube does, for example. You need to change axis to fix this. And rotate it if it needs.

безымянныи.png (132.0 kB)

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Answer 3

Answer by andrew-lukasik · May 29, 2021 at 01:39 PM

This graph will "billboard" any mesh with rotation (0,0,0) and uniform scale: mesh look at camera shader graph

It calculates "look at camera" rotation and applies it to vertex, normal and tangent.

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Answer 4

Answer by wolfgamek · May 29, 2021 at 11:39 AM

to fix rotation you need to do to this alt text

screenshot-1.png (72.3 kB)

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Answer 5

Answer by eckhard · Jan 31 at 07:22 PM

Thank you guys for pasting those, very elegant. Maybe you can you help me in the right direction based on the mentioned billboard shader?

posted a flollowup on this here: https://answers.unity.com/questions/1884566/shader-graph-restricted-billboard-to-one-axis.html

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andrew-lukasik · Jan 31 at 07:41 PM 0

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I suggest posting this as a separate question

eckhard andrew-lukasik · Jan 31 at 07:43 PM 0

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yes thanks for pointing it out:

https://answers.unity.com/questions/1884566/shader-graph-restricted-billboard-to-one-axis.html

How to do billboard shader with Shadergraph

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