Jagged Lines in my scene Exported through blender

Questions
1

Im a bit newbie in three.js
why there is somewhat a jagged line in the scene. Im using antialias.
I export the image from blender

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52800×348 47.9 KB

2

Please provide enough information for us to help you debug – your three.js code, a demo, the blender, scene, etc. We probably can’t guess from this image.