Vignette without post processing volume

Development Rendering
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1

To use post process volume on mobile it has to have HDR mode turned on, but it impacts performance a lot so i’m trying to find way to add vignette without that volume.

I tried adding image to widget blueprint but its completely black. Is there any other way?

2

You would have to do it all at the camera actor level.
Start here
and another link
and another

As I am an also curious to learn more about on camera effects. Lets learn this stuff!

3

There are second way to add vignette. It’s to add a semitransparent frame mesh around the border with gradient texture on it.

  • Material domain: Surface
  • Blend: Modulate
  • Shading: Unlit
  • Render After DOF: unchecked

I really recommend you to make a polygon around screen to minimize the overdraw.

You also may use UI domain and add this material as a widget (I guess this may be a proper way).

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4

Thanks! Exactly what I was searching for

5

Here. Made an example vignette mesh (file in attachment, FBX not allowed, so it’s in ZIP).

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[link text][2]

6

And this is how it looks when radius and density is set properly:

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7

https://developers.meta.com/horizon/blog/graphics-showcase-using-vulkan-subpasses-in-ue4-for-performant-tone-mapping-on-quest/

In the Fork from Meta is the Vulkan Subpass tweaked, so Vignette can be used at low cost.
Install the Meta fork und be sure to enable Subpass via:
r.Mobile.TonemapSubpass=1
Adds only around below 1ms Draw Time