Feature Request Turn off "Receive shadows" on custom PBR graph [LWRP]

Hi, standard LWRP "Lit" and "Simple Lit" shaders have a checkmark for turning off "Receive shadows" (see below. There needs to be something similar for custom lit graphs.



Also, as of 2019.1 (I'm using b8), the MeshRenderer component doesn't have a checkbox for "Receive shadows" anymore, so right now (as a mobile dev) I'm pretty stuck...

 

Hi,

This has been on our radar for some time now. Hopefully we will get to implementing this soon (it was/is dependent on some refactor work that is currently going on).

 

That's good to know. It would be great if you could treat this as a bug or somehow prioritize it, because it makes shadows on performance-sensitive devices unusable ATM (turning off shadows altogether seems to be the only way to avoid the performance penalty of having too many unwanted shadow receivers)...

 

Hi @Kink3d, any ETA on this one?

 

Hi I'm also very interested in this but especially for the HDRP! I have a feature in my current project that absolutely depends on it (especially implementable for only front- or back-facing, so turning it off on the mesh renderer won't help). I don't really speak HLSL so I'd rather not have to write a custom node for it if it's going to be on the horizon within the next couple months -- @Kink3d is there an ETA? Thanks!

 

I also need this functionality.

 

I need it too.

 

+1

 

I think this thread should get a response from a Unity employee...

 

Also looking for this feature.

Since this comes up on Google Search and others may want to know how to turn receive shadows off as of 9/19/2019.

Work around:
Open Shader in Shader Graph. Right click the master node and select view code. Copy the code and in Unity create new shader of the standard type so it opens in an editor. Open the file and paste the code in and add the following line near the top, you'll see other #pragma stuff where it should go.

Code (CSharp):

1. #pragma shader_feature _RECEIVE_SHADOWS_OFF

Save the shader file. In Unity select the new shader right click and create a new material from it. This material will no longer receive shadows.

Note:
Only downside is any change to the Shader Graph and you have to redo this.

 

> #pragma shader_feature _RECEIVE_SHADOWS_OFF
-- this doesn't seem to be working for me in 2019.3 beta.
I'm shocked this option is missing. I'm making a simple ground fog shader for VR and this is the only missing thing.

 

Does anyone know whom at Unity to make aware of this thread? Then please do. (Not getting a response from @Kink3d). This seems like such a blatant omission....

 

@LandonTownsend What version of Unity should be used with this ideally? Is the beta good enough or alpha preferred?

 

I tried using keywords.
It looks like I can't make unlit shader to receive shadows with _RECEIVE_SHADOWS_ON / OFF keywords.
But it works for PBR to not receive shadows.

 

Thanks, works fine.
But i wana receive the lighting settings fog in exponential mode too. I tried with the same steps and added FOG_EXP keyword as boolean from the global keywords in the shadergraph and in material keywords, but it does not work
What am I doing wrong?

 

@LandonTownsend Adding _RECEIVE_SHADOWS_OFF, or any keyword, to a Shader Graph breaks subsurface scattering -- it's as though subsurface scattering isn't enabled at all. Is this as expected? Thanks!

(I'm using 2019.3.0f1, HDRP version 7.1.6)

 

@LandonTownsend Any update on this for 2020.1? Is the debug / keywords workaround the only way to do this?

 

Any updates on this? The workaround works but is pretty bad to deal with on a pipeline basis.

 

Also wondering if there is any update on this? Workaround is not an option for us, because of generating too many variants by adding additional keywords.

 

+1

 

+1

 

Two years later and still the workaround is the only solution available? This feels like a very essential feature, I hope there will be a better solution soon...

Edit: I thought this wouldnt work, but it turned out I added a "Enum Keyword" instead of a boolean Keyword. After fixing my mistake it did work with Unity 2020.2.0f1

 

m yeah i am using the latest 2020 LTS and i tried the Keyword trick, but it doesn't work...

 

Have a look at my last comment, I thought it didnt work as well, but after switching from an enum keyword to a boolean keywork it actually worked!

 

Make sure that both name and the reference and the reference of the keyword is _RECEIVE_SHADOWS_OFF. I've spent like 20 mins to trying to figure it out what i did wrong, just because unity had set the reference to a different name.

 

and still no solution.... keyword does not work either :/ and yes its set to boolean and name + reference are _RECEIVE_SHADOWS_OFF

 

Thank you, this worked for me. Can I ask, what other built-in keywords are there we could use in similar fashion? Thinking of Zwrite and stenciling etc..
Cheers!