3D collision shapes difficult to see in editor

[AndHalfAFish]

Tested versions

not version-dependent

System information

not system-dependent

Issue description

It is often difficult to see collisionshapes in the editor (3d scenes). There doesn't seem to be a way to make the lines more easily visible (color, thickness).
Examples from front view & top view :

Steps to reproduce

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Minimal reproduction project (MRP)

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[AThousandShips]

As far as I recall this is due to limitations with 3D rendering, drawing non-thin lines is not trivial and I don't think we have a built-in system to draw wide lines in 3D, note how there's a point_size in materials and spatial shaders, but no line_width

See also:

• Add a darker outline to 3D gizmos to ensure better visibility godot-proposals#3322
• Add singletons for 2D and 3D debug drawing godot-proposals#5196

[Zireael07]

Re the color, there's already an open proposal for that too

[AThousandShips]

The color you can edit with editors/3d_gizmos/gizmo_colors/shape

[AndHalfAFish]

Re color : yes, that works (after editor restart) !

[levidavidmurray]

The color you can edit with editors/3d_gizmos/gizmo_colors/shape

Looks like editors/3d_gizmos/gizmo_colors/shape was removed in this PR: #90966, and the ability to customize CollisionShape3D debug colours will be added back here: #90644

[Calinou]

Looks like editors/3d_gizmos/gizmo_colors/shape was removed in this PR: #90966, and the ability to customize CollisionShape3D debug colours will be added back here: #90644

CollisionShape3D custom colors can still be adjusted in the project setting as per the linked PR's description:

Editor settings for 3D path and shape gizmo colors were removed, as these colors are now set in the project settings instead (they affect both the editor and running project).