Feature Request Custom Render Texture Shader Graph

I've been looking around for possible solutions but so far have come up mostly empty handed for native shader graph. Amplify's shader editor does currently have a solution for this but I'd prefer to stick with native tools.

 

https://docs.unity3d.com/Manual/class-CustomRenderTexture.html
(Supposed to work with HDRP but presently only runs on LWRP)
(If you need it for HDRP, add both packages to your project, CRT with any LWRP shader, and read into your HDRP mat/shadergraph/shader)

 

Right, however this requires the shader template to have a particular format which to my knowledge shader graph does not allow.

Shaders for custom render textures must do the following

* #include “UnityCustomRenderTexture.cginc”

• Use the provided Vertex Shader
  CustomRenderTextureVertexShader
  
  
• Use the provided input structure v2f_customrendertexture for the pixel shader
  

 

Sorry for the late response.

I thought so too, but LWRP/URP works with custom render textures for me.

 

The shader graph does? I know that both SRPs support custom render textures but I’ve been unable to see so far how to create a shader in shader graph for CRTs so far since they require a few specific lines in the generated shader code

 

Yes. Just use a LWRP unlit master node (note World position node & other similar nodes will not work as expected -since the texture does not have a position in the game) and use that material in a CRT.

Terrain displacement is a LWRP unlit shadergraph material (which is why it is gray in the project window).
Note the Unnamed Pass 0.

 

Hey, I ran into the same problem. I tried the unlit master node in my shader graph material but have only the options "pass", "shadow caster" and "depth only" in the pass selection of the CRT. "unnamed pass 0" is only apppearing in non-shadergraph unlit shader. Did you find any other solution? Or do I miss here something? Thanks!

 

@jitterhorse sorry, no luck on my end. I've just been using Amplify Shader Editor. @A132LW Not sure how to reproduce this? As a basic example what I would be trying to do is render the main camera to the custom render texture and then have the shader pickup the texture input from the camera to perform an op. A dead simple example would be like a simple color invert of the incoming texture

 

Sorry, meant to respond earlier and forgot. I haven't found another solution.

"Unnamed pass 0" should appear in the unlit shadergraph - BUT only with LWRP/URP unlit master.
So at present, I am using a CRT using a URP/LWRP unlit master node based shadergraph, which then can be used as input to a HDRP shadergraph/default shaders.

(I am assuming you are using HDRP unlit - since you don't have the unnamed pass).


*Note that if you are using the 2020b, then try the ForwardOnly pass on the unlit master (LWRP/URP, not HDRP).
Also note below images are for the 2020beta. You don't need to upgrade to the beta, it works with any 2019 version -not sure about the early 2018 versions, because I don't remember if I used this workaround back then.



(again, if this is an older version, you would be using the unnamed pass above, and the material would be pink - if you are on HDRP)

What version are you using (Unity, HDRP/LWRP)?

 

This now seems to work with Unity 2021.2+ : a BuiltIn Unlit Shader Graph can be used by a material to update a Custom Render Texture, as shown below: