How to properly declare a TextureParameter in a Custom PostProcessing Effect?

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Hello guys , I'm having a bit of troubke when trying to make cuatom postbprocessing effects that require extra texgures . Here is my code :

 [Serializable]
 [PostProcess(typeof(TextureOverlayRenderer), PostProcessEvent.BeforeStack, "Custom/TextureOverlay")]
 public sealed class PostProcessingEffect_TextureOverlay : PostProcessEffectSettings
 {
     [Tooltip("Texture To Apply")]
     public TextureParameter overlayTexture = new TextureParameter();
     [Range(1.0f, 20.0f), Tooltip("Texture Repeat Factor")]
     public FloatParameter textureRepeatFactor = new FloatParameter { value = 1.0f };
     [Range(0f, 1f), Tooltip("Effect Opacity")]
     public FloatParameter opacity = new FloatParameter { value = 0.5f };
 
     public override bool IsEnabledAndSupported(PostProcessRenderContext context)
     {
         return enabled.value && (overlayTexture != null) && (opacity>0);
     }
 }
 
 public sealed class TextureOverlayRenderer : PostProcessEffectRenderer<PostProcessingEffect_TextureOverlay>
 {
     public override void Render(PostProcessRenderContext context)
     {
         var sheet = context.propertySheets.Get(Shader.Find("Hidden/Custom/TextureOverlay"));
         sheet.properties.SetTexture("_OverlayTexture", settings.overlayTexture);
         sheet.properties.SetFloat("_TextureRepeatFactor", settings.textureRepeatFactor);
         sheet.properties.SetFloat("_EffectOpacity", settings.opacity);
         context.command.BlitFullscreenTriangle(context.source, context.destination, sheet, 0);
     }
 }

As you can see , I´m declaring the texture and setting it to new TextureParameter(). However in editor I'm always getting erros concerning that texture. The most common one is "Argument Null Exception , Argument cannot be null. Parameter Name:Value"

I really don't know what to do , when I move something in the effect editor or add the effect to the post processing cinemachine component those errors show up . But whem I'm in play mode they seem to go away.

Answer 1

Answer by InkaTorque · Feb 19, 2019 at 06:14 AM

Anyone?? No one??? Because of those null references the setup of the post process in every virtual camera is getting erased randomly

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Answer 2

Answer by watsonsong · Feb 22, 2020 at 05:37 AM

@InkaTorque, Have you resolve this, I think I met the same problem.

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Answer 3

Answer by sharkwithlasers · Mar 24, 2020 at 06:33 AM

EDIT: Found a solution to this. The sequence of steps I used is as follows:

Add the TextureParameter to the *Settings class
Add this post processing effect as an effect in your post processing profile.
Set the texture in your post processing profile
Add the sheet.properties.SetTexture(...) statement in your *Renderer class.

This is a hacky fix, but it worked for me. I could definitely see this being super tedious when using this effect across many different profiles/projects (you'll need to comment out step 4, set the texture as in step 4, then uncomment out your comment).

I'd love to know if there is a better solution to this, however.

Original Post: I'm getting the same issue as well. Even when I have a null check in the Render function.

No clue what's going on.

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Answer 4

Answer by yl_tys · Jul 22, 2021 at 09:49 AM

// Reference (UnityPackage: Post Processing Texture Overlay)

 public sealed class PostMask : PostProcessEffectSettings
 {
     public TextureParameter maskTex = new TextureParameter { value = null };
 }
 
 public sealed class PostMaskRenderer : PostProcessEffectRenderer
 {
     public override void Render(PostProcessRenderContext context)
     {
         var sheet = context.propertySheets.Get(Shader.Find("Hidden/tys/PostMask"));
 
         var imageTexture = settings.maskTex.value == null? RuntimeUtilities.whiteTexture: settings.maskTex.value;
         sheet.properties.SetTexture("_MaskTex", imageTexture);
         context.command.BlitFullscreenTriangle(context.source, context.destination, sheet, 0);
     }
 }

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How to properly declare a TextureParameter in a Custom PostProcessing Effect?

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