World Triplanar is broken with double-precision build

[fire]

Tested versions

• Reproducible in master. c4733e8
• Reproducible in 4.2. 190cbcf
• Reproducible in 4.1. 845fb92

System information

Mac Mini, Apple Silicon, M2 Pro

Issue description

Triplanar broke in tests.

https://github.com/V-Sekai/godot-double-precision-test

See #90950 (comment)

Broken

OK

Please ignore the rigged mesh test here.

Steps to reproduce

1. Ensure you have a double precision version of Godot Engine
2. Load mrp https://github.com/V-Sekai/godot-double-precision-test
3. Switch to the far version of the test scene.
4. Check that tri-planar is fuzzy on single-precision
5. Check that tri-planar is fuzzy on double-precision (bug)

Minimal reproduction project (MRP)

https://github.com/V-Sekai/godot-double-precision-test

[fire]

@Zylann is depending on this.

[Calinou]

Note that World Triplanar is enabled in the MRP, and it's a known limitation that it doesn't look correct when far away from the world origin in double-precision builds: #58516

The issue should go away for now if you disable World Triplanar. There's also a PR that fixes the issue: #75577