Troubleshooting

intermediate troubleshooting

Highlight Plus 2D · Troubleshooting & FAQ

Common issues and their solutions when working with Highlight Plus 2D.

Effects Not Visible

Possible Cause	Solution
No `HighlightEffect2D` component	Add Highlight Effect 2D to the sprite GameObject.
Highlighted is unchecked	Enable Highlighted in the Inspector, or set `effect.highlighted = true` from script.
No effect enabled	Enable at least one effect (Outline, Glow, Overlay, etc.) in the component.
Sprite on a high sorting layer	Effects render on Sorting Layer 0 by default. Move sprites to a lower sorting layer, or adjust the effect sorting layer.
Alpha Cut Off too high	Lower the Alpha Cut Off value so visible pixels are not discarded.

See-Through Not Working

Possible Cause	Solution
Occluder not enabled	The sprite in front must have `HighlightEffect2D` with Occluder enabled.
See-Through not enabled on target	The sprite behind must have See-Through enabled in its `HighlightEffect2D`.

Trigger Not Responding to Pointer

Possible Cause	Solution
Missing collider	Add a `Collider2D` (e.g. `BoxCollider2D`) to the sprite.
No Physics2D Raycaster	Ensure your camera has a Physics 2D Raycaster component (required for UI-based pointer detection).

Sorting Layer Issues

Highlight Plus 2D effects render on Sorting Layer 0 by default. If your sprites use a higher sorting layer, effects may appear behind the sprite.

Fix: Move sprites to a sorting layer with an order value that does not conflict, or adjust the effect rendering order.

Spine / Mesh Renderer Issues

When using Highlight Plus 2D with MeshRenderer (e.g. Spine), enable the Preserve Mesh option in the General section. This uses the original mesh data instead of a generated quad.

Polygon / SVG Sprites Not Rendering Correctly

Enable the Polygon / SVG toggle in the General section when using polygon-packed or SVG sprites.

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