Fog of War

I'm running URP + WebGL and got some problems.
Unity version is 2021.3.2f1

1. In the FogOfWarURP shader, target shader model is 4.5

Code (CSharp):

1. pragma target 4.5

I have to change it to 3.5, otherwise it will pop this error

Code (CSharp):

1. Fog Of War: The following shader is not supported: Hidden/FogOfWarURP

Is there any features from shader model 4.0+ being used? Since WebGL 2.0 only supports OpenGL ES 3.0, I'm guessing targeting beyond 3.5 won't work for WebGL

2. Once I changed #pragma target 4.5 to 3.5, there's still no fog when running in Firefox
However when running in Chrome, I can see fog but whole screen turns upside-down


Any help would be appreciated.

 

I believe I've fixed this issue but it hasn't been released yet. Could you send me an email (you can find it on the asset store page or in the user guide) and I'll send you an updated unitypackage.

 

Greetings! I encountered a little issue. In Unity 2022.1.0f1 with URP 13.1.8, as soon as I add the FogOfWarURPFeature I get spammed with following error:

You can only call cameraColorTarget inside the scope of a ScriptableRenderPass. Otherwise the pipeline camera target texture might have not been created or might have already been disposed.

UnityEngine.Rendering.Universal.ScriptableRenderer:get_cameraColorTarget ()

FoW.FogOfWarURPFeature:AddRenderPasses (UnityEngine.Rendering.Universal.ScriptableRenderer,UnityEngine.Rendering.Universal.RenderingData&) (at Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs:17)

UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

I can still enter play mode, but seeing this red line all the time freaks me out! I guess it's a compatibility issue?

 

Thanks for pointing this out!
I have a fix for this. Could you send me an email (you can find it on the asset store page or in the user guide) and I'll send you a unity package with the fix.

 

Sent! Thank you for your support and this great, reliable asset!

 

Thanks for the awesome asset! I am having one issue though. When using URP and building for the Quest 2 it gets stuck at the Unity logo, which flashes and is frozen in place. It works in the editor and on the Quest 2 when I switch from multi-view to multi-pass, but multi-pass is very slow and has it's own issues. I've tried both hardware and software mode and still no luck getting it to work with multi-view. Any ideas?

 

I've had trouble with multi-pass in the past, but last I heard it was working (although performance may be worse).
Are you able to see logs of what is happening?

 

There appears to be a compatability issue with Unity 2021.3+ in URP when using SSAO or Screenspace Shadows. Turning these off on the Universal Render Data will make Fog Of War work properly. I'm currently looking into a fix for the issue.

 

Here's the error that comes up and a related thread, it looks like it's Oculus specific and possibly related to an OnGui call. I'm using Unity 2020.3.34. Maybe there's some kind of work around?

Edit: On Vulcan it starts without error and the profiler shows everything is running, although the screen is grey.

 

Interesting. As far as I can tell from some dead end forum posts, it looks like this might be on unity's end.

Could you try using a different renderer? You can do this in Player Settings > Other Setting and changing the order of items in the Graphics API list.

Unfortunately, I don't have a Quest 2 to test this so I can't do this myself

 

On OpenGLES2 it has a black screen and this error:

On OpenGLES3 it has a black screen and this error:

On Vulcan everything seems to be working according to the profiler and there are no errors, but the screen is completely gray. I notice a significant FPS increase when I look up(away from all the units), so presumably they're being rendered but are not visible.

 

when you draw on the hardware, there is a step to read from the render texture then do the fade and blur on CPU, reading from the renderer is very slow, if you dont have to read from the renderer and do everything on the GPU this will be much faster.

 

the Semaphore.WaitForSignal is huge chunk of time, @stu_pidd_cow I hope you will find time to optimize it.

 

Semaphore.WaitForSignal is a symptom of the issue, rather than the issue itself.

Yes, this is currently an issue for hardware mode but is required due to the CPU needing to query the fog texture (usually by FogOfWarUnit to test for visibility). I'm currently working on a solution that erradicates this, but it will require a rewrite of some of the more complex areas of the system.
In the meantime, I recommend sticking to software mode, or keeping your Map Resolution as low as possible. You should also disable Output To Texture for any FogOfWarTeams that are not currently visible.

 

This OpenGLES2 error sounds promising. According to here, depth buffers aren't supported on RenderTextures. This should be easy to test. Could you try the following:

1. Remove any FogOfWarClearFog scripts in the scene.
2. Go to FogOfWarDrawerHardware.cs and change the following line in OnInitialise() from:
   
   Code (CSharp):

   1. _renderTexture = new RenderTexture(_map.resolution.x, _map.resolution.y, 16, RenderTextureFormat.ARGB32);
   to:
   
   Code (CSharp):

   1. _renderTexture = new RenderTexture(_map.resolution.x, _map.resolution.y, 0, RenderTextureFormat.ARGB32);

Hopefully that will fix the issue. I'll try to come up with a better solution for the clear fog in the meantime.

 

in 2020.3.18f ,urp ,and just like this

 

I have tested with 2020.3.34f1 and it appears to work fine. Could you send me an email and I'll try sending you general fix that may rectify this?

 

Since there is still no officially released fix, you can fix it by applying the following changes (in version 1.24):

Code (CSharp):

1. Index: Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs
2. ===================================================================
3. diff --git a/Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs b/Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs
4. --- a/Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs    (revision original)
5. +++ b/Assets/FogOfWar/Core/URP/FogOfWarURPFeature.cs    (date 1660475479570)
6. @@ -14,7 +14,7 @@
7.          public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
8.          {
9. -            _fowPass.Setup(renderer.cameraColorTarget);
10. +            // _fowPass.Setup(renderer.cameraColorTarget);
11.              renderer.EnqueuePass(_fowPass);
12.          }
13.      }
14. Index: Assets/FogOfWar/Core/URP/FogOfWarURPPass.cs
15. ===================================================================
16. diff --git a/Assets/FogOfWar/Core/URP/FogOfWarURPPass.cs b/Assets/FogOfWar/Core/URP/FogOfWarURPPass.cs
17. --- a/Assets/FogOfWar/Core/URP/FogOfWarURPPass.cs    (revision original)
18. +++ b/Assets/FogOfWar/Core/URP/FogOfWarURPPass.cs    (date 1660477145891)
19. @@ -100,6 +100,7 @@
20.              CommandBuffer cmd = CommandBufferPool.Get("FogOfWarURP");
21. +            _postProcess.sourceTarget = renderingData.cameraData.renderer.cameraColorTargetHandle.nameID;
22.              _postProcess.Setup(cmd, ref context, ref renderingData);
23.              _postProcess.team = _fowURP.team.value;
24.              _postProcess.camera = renderingData.cameraData.camera;
25.  

 

Is there any way to make a fog of war similar to the one in the image? (as if it were smoke)

 

I think the best way to achieve this would be to have a slightly grey-colored fog, and on the FogOfWarUnit component, have a large radius with a small inner radius (so that there is more falloff). You can also experiment with the clear fog functionality to have a more non-uniform smokey look.

 

Is there a way to set a specific fog value for a shape (e.g. I have a hex shape using a texture) instead of just bounds like in FogOfWarTeam.SetFog?

 

Are you talking about the brightness of the shape, or the shape itself?
There is the Brightness slider on the FogOfWarUnit component to adjust that.
For the shape, you can input a single channel texture into the Texture field on the FogOfWarUnit component.

 

Thanks. I am aware of this. I was looking for a function which clears fog from 255 down to a certain value without using a FogOfWarUnit like the SetFog function in FogOfWarTeam, but using a texture or a mesh.

 

There's nothing to do this out of the box. I'd recommend just instantiating a FogOfWarUnit and placing it where you want. You can hide it again after a single frame to reuse it for later.
If you still want to go the code route, you can modify the code in FogOfWarTeam.ProcessUnits() (especially where it calls FogOfWarUnit.GetShape()). You would want to create your own FogOfWarShape to send to the drawer. Feel free to email me if you want help with it.