fog in deffered

fog doesnt work anymore in deffered lighting? or there is some information about difference betwen deffered and deffered legacy?

video with issue

 

Interesting looking game, what is it?

 

this is just scene

 

I believe the built in fog isn't supposed to work in the deferred and you should use the fog post effect.

 

but in unity4 its just works. why it doesnt in unity5 ?

 

It is my understanding that in Unity4, fog was a function written into shaders individually. If you didn't write it into a new shader, it was not there.

Unity5 uses a post effect to draw fog based on the deferred depth buffer. This will work regardless of your shaders used, you will never have a shader ignore the fog.

In a way, this "just works" FAR better than it did in Unity4.

 

Except of course for geometry that doesn't write to the zbuffer.

 

Doesn`t work here. I have attached the global fog script to my main camera. It only works in forward or legacy deferred mode. Not in deferred. I have ticked global fog in the lighting window. Do i miss something ?

 

Fog is simply broken under deferred mode. I have the same issue as you do and switched my game back to forward rendering. Forget about "Global Fog" as it won't work on some objects and will result in odd looking scenes.

 

Filed a bug report: Case 660385

 

Are your ImageEffects up to date for your version of Unity 5 Beta? I've been successfully using Global Fog as a camera post-effect in Deferred rendering mode for a while BUT I have been re-downloading 'Standard/Sample' assets for each Beta as they do get updated also from time to time.

 

After doing a clean install of U5 b18 and using the fps controller from the sample assets it is working now.
Thank you.

 

I tried using the global fog camera effect. I found it is not nearly as nice as the old fog method. The old fog method allowed it to slowly get more dense, the global fog feels more like a wall of fog. I had to add the component twice, one closer and one farther to really get a smooth transition. One aspect I do like about it is the horizon seamlessly blends with the horizon unlike the old method, but I do think it is a bit more expensive.

It takes about 0.2-0.25MS for me to process each global fog component.

Here's a picture:

 

You're exactly right, I was using the old global fog from Unity 4. Just updated it

Edit: Transparent objects are practically impossible to use now though since fog completely doesn't affect them..... This isn't a solution...

 

To confirm the built-in fog doesn't work in Deferred rendering mode right?

 

it is by using image effect.
and yes, transparent (semitransparent, not cutout) objects are not affecting by post effect fog. cheked it... and got little frustration =((

 

So if regular built in fog affects transparent objects, why can't the 5.0 post effect? We have now lost a necessary feature in deferred. Can the 5.0 post effect not also affect transparent objects correctly like the built in fog? Or is it just not possible in deferred shading?

 

The only problem I have with the Unity5's GlobalFog is that, because it's z-buffer based, it's dependent on the draw distance of the camera. My current project dynamically changes the draw distance of a camera to reduce unnecessary draw calls (using the camera's frustum culling like a pseudo occlusion culling)... so the fog keeps getting closer or recedes depending on how far (or close) the draw distance is.

P.S. I can't use Unity's built-in occlusion culling because my environment is created at run-time.

 

You can utilize dynamic batching, i had the same problem. It only works below 320 Tris so instead of actually combining meshs split them and you'll have dynamic batching on them.

 

@Aras about the current global fog, in unity4 the height fog are affecting the skybox, but in unity5 it doesn't. Is there a way to get this effect back, something that i can change for this in the code somewhere?

@Edit : Nvm.... got it

 

Right, but then I'd have to work around the geometry limit as opposed to figuring out a way to get fog working... Thanks for replying but I'm afraid that what you're suggesting is merely replacing one annoyance with a major constraint; not to mention it still doesn't remove the need to have some form of occlusion culling.

I wonder if I could get a fog-like shader to work on a distant object that's linked to the camera...

 

Yup, i found the depth check part, i need the skybox to be affected since i want to add a simple hgphase function in the fog. And it works great , just need it to affect the transparent objects.

 

@rea Look nice.

 

Holy cow that fog and lighting is awesome. Are you using your own effects for the fog, bloom, and lighting or is that Unity stuff?

 

Thanks guys,
@Whippets all built in, no bloom. only tonemapping and a slight modified global fog.
@Aras sadly it's still doesn't looks right, is there a way to get the same fog in deferred just the same as using forward and legacy deferred?

 

Global image effect fog seems like a waste of performance and looks identical to vertex shader fog in a lot of cases. Would Unity consider injecting vertex colour fog? ie lerp to, or is this out of the question? I ask because it neatly solves issues with transparency and z buffer, and it's a lot of work having to replace unity built in standard shader with a surface shader version.

 

That could be a great workaround actually as long as the fog are flexible and accessible script, ie can be a used to deal with SSAO by using the fog buffer to fade the SSAO intensity.

 

@Aras So, I think I may have found a bug in Unity 5.0.0f1 but I'd like an expert to confirm.

When using deferred rendering, the Global Fog image effect does not properly occlude ambient lighting or directional lighting that intersects the far clip plane. In fact, it might not occlude geometry that intersects the far clip plane at all, and perhaps turning off any nearby lighting just hides it. I have some screenshots that demonstrate the problem (you'll need to zoom in to see). Notice the thin line running across the Game window; that's where the camera's far clip plane intersects a Terrain object and some geometry that are both lit by ambient light and a directional light.

The first screenshot has all image effects turned off so you can get a sense of the scene.

The second screenshot has all image effects turned off (except for the global fog) to help demonstrate the issue.

The final screenshot has all image effects turned on. Fog is disabled in the render settings in this screenshot, but I found that enabling it seems to remove the problem from the terrain, but the blue directional light is still visible on the geometry that intersects the far clip plane.



Am I just doing it wrong? I'm happy to take more screens or zip up the entire project if you need more information.

 

@Aras Sure, no problem. I included my description and screenshots, and Unity is packing up the 8GB game now. I'm assuming there'll be a sharable bug report link when it's done, so I'll post it here if you want to take a look yourself.

Edit: It has been filed http://fogbugz.unity3d.com/default.asp?672106_dro2ums4suc7gnpo