[SOLVED] Render worldspace UI on top of everything.

Unity Engine
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1

Hello, I have a basic worldspace UI canvas that I need to render on top of everything in front of it. This is for VR so I have reasons. Its a simple rectangular UI sprite image, with a basic UI mask sprite (circle). I’m using built-in render pipeline, and we are not using the Unity layering system (yes I know :sweat_smile:)

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2

I created a basic unlit frag shader with Z space parameters as such

Blend SrcAlpha OneMinusSrcAlpha, One OneMinusSrcAlpha
ZWrite Off
ZTest Always

I attached this to the image and mask, and it renders them on top of every thing but the mask stops masking. Can anyone recommend a way to enable the mask?

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3

My research tells me I might need to use a stencil buffer, but I’m not entirely sure how that works

4

You can try using normal Canvas

Recalculate when the camera moves

Calibrate the world spatial position that the image should correspond to

5

Thanks for replying. By normal canvas do you mean screen space overlay? I’m using VR so I need to use WorldSpace, nor can I reference the camera, as there are two. One for each eye. I tried a Stencil mask, works very well. But stencil doesn’t seem to work with UI objects

6

I found the solution: there is a modified UI default shader that included stencil parameters. I added Ztest Always:|