Bug causing horizontal lines to glitch

In my Voxel.js project, which is based on Three.js, I have noticed a strange rendering issue specifically on Macbook Airs with Intel HD Graphics 3000. Interestingly, this problem does not occur on other Macbooks like those with GeForce 320Ms.

I have gathered 4 screenshots from the Canary WebGL Profiler to showcase how the abnormal line appears: https://i.sstatic.net/VMVJ2.jpg

The line itself blends in with the color of the three.js renderer fill, making it invisible until non-fill colored elements are added to the canvas.

To help reproduce the glitch, I have created a demo that you can check out here: . Just explore the demo until the lines become visible.

You can also view a video showcasing the glitches during gameplay here: http://www.youtube.com/watch?v=KfR8tJ36KuY

Additionally, here is another screenshot where the fill color is set to pink: https://i.sstatic.net/WSGV1.png

I suspect that the code causing this glitch can be found here: https://github.com/shama/voxel-texture/blob/master/index.js

We used to rely on many .png textures, each for a different texture. Now, we utilize composite texture atlases that are dynamically generated and packed, as seen here: https://i.sstatic.net/HdS0S.jpg

Has anyone encountered similar behavior before? Any suggestions on how I can pinpoint the cause of this issue?

Answer №1

Have you noticed similar issues in Safari as well? It is possible that the bugs are related to Apple's graphics drivers. To troubleshoot, try running different WebGL applications on those MacBooks and observe if they also display the same glitches.

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