I doubt this is intended.
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Comments 18
The texture is supposed to be additive, seems like that's not working correctly on fabulous graphics.
8 more comments
MC-187669
World border is rendered too dark on "Fabulous!" graphic settings
Open
19
(Unassigned)
Confirmed
Platform
Normal
Rendering
fabulous, graphics-setting, world-border
1.16 Pre-release 2, 1.16 Pre-release 3, 1.16 Pre-release 5, 1.16 Release Candidate 1, 1.16, ..., 1.19.4, 23w16a, 1.20.1, 1.20.4, 1.21.1
Retrieved
It looks like with "Fabulous" the color also changes (when looking in some directions) when you see multiple sides of the world border behind each other.