How to Fix a Unity URP Camera Stack Not Rendering

A URP camera stack not rendering is a stack-setup problem. Here is how to fix it.

How to fix it

1. Set render types

In URP, the main camera must be render type Base and the camera drawn over it Overlay. A second Base camera does not stack; an Overlay not added to a stack does not render. Set the types correctly.

2. Add overlay to the stack

Add the overlay camera to the base camera's Camera Stack list. An overlay camera that exists but is not in any base camera's stack draws nothing.

3. Configure layers and clear

Set the overlay camera's culling mask to the layers it should draw and confirm its clear settings do not erase the base. Wrong layers or clear flags make the overlay appear empty over the base.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every Unity error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.