[UE5.6][PICO XR] World Space UMG UI is affected by global post process bloom and color grading

Development Programming & Scripting UI
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Hi everyone,

I’m working on a PICO XR project with UE 5.6.

I have a World Space UMG UI placed in the XR world space.

Problem

The UI is being contaminated by global post process effects (bloom, color grading, global post process material).

The UI gets tinted, over-bright and can’t keep original pure color.

What I have tried

  1. Tried to set Post Process Volume unbound / adjust priority, no improvement.

  2. Set UMG render mode to World Space, tried different layer order.

  3. Tried to disable bloom for UI actor, still affected.

  4. In XR stereo render pass, the UI is merged into main scene render target, affected by all post process.

What I need

Is there a proper way to exclude XR World Space UI from global post process?

Such as:

  • Render UI to separate render target

  • Ignore post process volume for UI only

  • Custom render layer / render order to skip post process

Any solution or project setting tip is appreciated.

Thanks!