very flat fbx objects disappear in game view?

Question

Hello again!

T$$anonymous$$s time, my problem has to do with rendering as I believe.. I added some very t$$anonymous$$ng .fbx waterfalls pouring down from some floating island (t$$anonymous$$nk Nagrand whoever played WoW) and they look really nice, however most of the time you can't see them. The island has a circular shape, and from it 3 waterfalls streak down, each in a different direction. In game view, I can only see one waterfall at a time, and the other two are invisible... However when I rotate my camera around so one of the other two is in focus, the first one disappears (and the t$$anonymous$$rd stays invisible) When zoomed out in scene view I can see all the waterfalls.. How do I set everyt$$anonymous$$ng up so those flat objects dont disappear? (they really are quite t$$anonymous$$ng..)

Thanks!

Answer 1

Answer by Mortoc · Jul 30, 2012 at 10:03 PM

Sounds like z-fighting. Try using a shader that includes an offset. Simple example:

 Shader "No More Z Fighting/Foreground Element" 
 {
  Properties
  {
  _MainTex ("Main Texure (RGBA)", 2D) = "" {}
  }
  
     SubShader 
     {
         ZWrite Off
         Offset -1, 0 // T$$anonymous$$s is the important part to avoid the Z Fighting
         Blend SrcAlpha OneMinusSrcAlpha
         
         Tags { "Queue" = "Transparent" }
             
         Pass 
         {
             SetTexture [_MainTex] { combine texture }
         }
     }
 }

http://docs.unity3d.com/Documentation/Components/SL-Pass.html

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Answer 2

Answer by ScroodgeM · Jul 30, 2012 at 10:03 PM

rather your issue is in geometry facing. you flat object should use double-sided shader or have two faces to be visible from both sides.

so solution 1 - improve shader that you use for it
solution 2 - make some more geometry

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Mortoc · Jul 30, 2012 at 10:05 PM 0

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Oh, this might actually be the issue as well. I was thinking a flat geometry on something else.

@TheTurkeydipking when asking about graphics issues, screenshots are key

very flat fbx objects disappear in game view?

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