Why doesn't my world click work when UI is on screen?

Canvas Graphic Raycaster intercepts clicks first. Any UI element with RaycastTarget=true blocks them. Set RaycastTarget=false on background overlays so clicks pass through.

How do I block UI but allow world?

Pause-menu Image with RaycastTarget=true blocks. Otherwise specific UI elements (buttons) keep RaycastTarget=true; cosmetic backgrounds set false.

Fix: UI Graphic Raycaster Eats World Clicks

Q: Add Physics2DRaycaster?

On the camera that renders 2D world. It dispatches IPointerClickHandler events to colliders the click hits, so world objects get IPointerClick callbacks.

Quick answer: Cosmetic UI Image: RaycastTarget = false. World camera: add Physics2DRaycaster. Buttons keep RaycastTarget true.

Full-screen HUD with score panel. Click on a world enemy. Nothing happens. The HUD background, with RaycastTarget on, swallowed the click.

The Fix

HUD background Image:
  Raycast Target:    false     // don't block
HUD button:
  Raycast Target:    true      // still clickable

World camera:
  + Physics 2D Raycaster
    Event Mask:      Default

Enemy GameObject:
  + EventTrigger or IPointerClickHandler script

Cosmetic graphics shouldn’t block. Buttons opt in. Physics2DRaycaster routes pointer events to colliders.

Verifying

Click HUD button: triggers. Click world enemy through HUD background: enemy reacts. Click HUD label area: passes through.

“Cosmetic off. Interactive on. World rays through.”

Related Issues

For Canvas Scaler mobile, see Canvas Scaler. For TMP InputField caret, see TMP caret.

Cosmetic off. Buttons on.