How to hide objects inside of- or behind another transparent object?

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I need 3D objects to be invisible if they're behind or inside an invisible cube, without having to apply a custom shader to the objects. I can apply a custom shader to the invisible cube. I've experimented with stencil masks and depth buffers, but haven't achieved both a transparent cube and the objects behind it to be hidden. I know very very little about shaders. Any help would be greatly appreciated!

Answer 1

Answer by joepeijkemans · Jun 25, 2020 at 11:55 AM

I fixed it with a depth buffer: https://github.com/doomlaser/DepthMask-Unity-Shader/blob/master/DepthMask.shader

I then added an extra layer to ignore with the camera so that the clear flags of the camera are updated through the object

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Answer 2

Answer by louiselessel · Nov 13, 2020 at 08:22 PM

Hi!

This seems like a very good solution, I too have been chasing the stencil masks for a while now.

How are you doing the second part with the clear flags though? Can you provide an image of your settings?

I'm getting a black shader in my camera view. (I'm trying to hid eat butt of the turtle)

[1]: /storage/temp/170978-screen-shot-2020-11-13-at-31730-pm.png

screen-shot-2020-11-13-at-31730-pm.png (507.3 kB)

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LeoThePhoenix · Jul 20, 2021 at 08:10 PM 0

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Hi, this problem also made me crazy. Then I found this subpost http://answers.unity.com/comments/1463692/view.html

You have to change { "Queue"="Geometry+1" } to { "Queue"="Transparent+1" }

louiselessel · Jul 20, 2021 at 09:05 PM 1

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@LeoThePhoenix thank you!

It truly did drive me crazy. So I actually ended up using this solution as can be seen here: https://www.instagram.com/p/CJzIYh6lvZY/

“Per-Object Clipping Planes Shader in Unity3D 5” tutorial by toxicFork / Firtina Ozbalikci. http://www.toxicfork.com/194/per-object-clipping-planes-shader-in-unity3d-5

There is a unity project in the bottom of the tutorial. Saved me heaps of time. I think it has limitations perhaps for the never render pipelines, but have not tested.

LeoThePhoenix louiselessel · Jul 20, 2021 at 09:14 PM 0

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Thank you, I will have a look at your solution. It seems to provide some additional possibilities =) My initial problem was Unity's URP btw. And the solution I've found finally works there.

How to hide objects inside of- or behind another transparent object?

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