LineRenderer Flickering/Disappearing on Android Devices

Unity Engine
1

Hi everyone,

I’ve been facing an issue with Unity’s LineRenderer when trying to draw a trajectory with a large number of points. Here’s what I’ve observed:

  • Vulkan: The curve starts flickering or disappearing at 174,763 points.
  • OpenGLES3: The flickering issue is resolved, but the app crashes when rendering around 340,000 points.

Details:

  • Unity version: 2022.3
  • Tested devices: Galaxy S10 and Galaxy S24 (both reproduce the problem).
  • Graphics API: Vulkan and OpenGLES3 (results differ, as described above).
  • Additional observations: Splitting the trajectory into smaller segments does not resolve the issue.

What I’ve Tried:

  1. Switching between Vulkan and OpenGLES3 (as mentioned, both have different issues).
  2. Testing with various materials, shaders, and rendering settings for the LineRenderer.
  3. Simplifying the curve to ensure it’s purely a LineRenderer issue and not related to other logic.

Questions:

  • Is there a known point limit or rendering bottleneck for LineRenderer on Android, especially when using Vulkan or OpenGLES3?
  • Are there alternative approaches or optimizations for rendering trajectories with such a large number of points?

Any advice, insights, or suggestions would be greatly appreciated. Thanks in advance!