in 3D, how can I cut away pieces of an octagon, while keeping a seamless texture?

This site is currently in read-only mode during migration to a new platform.
You cannot post questions, answers or comments, as they would be lost during the migration otherwise.
+1 vote

Update: I found a material flag called "World Triplanar," which seems to work as if the texture was projected from above my shape, but it doesn't move or rotate with the shape like I need D:

In my game I have a 3D scene, with a circle of 8 triangles making up a flat octagon. I want to draw a repeated texture seamlessly on top of this octagon, while still being able to enable and disable triangles individually.

here you can see each piece has the same independent texture, instead of a single image
this should be a single flat texture. even more obvious when I animate the offset

I also need to be able to offset the texture whenever, and make sure it still looks right.

here you can see the effect I'm going for, except this is a single mesh and I can't disable pieces of it
correct sorta

In Gamemaker using 2D I would use a full octagon and mask out the disabled triangles, but I'm new to Godot and 3D in general so I'm not sure where to start with this. Any ideas? should I be using multiple nodes for the separate triangles at all?

Godot version 3.4.stable.official
in Engine by (13 points)
edited by

Please log in or register to answer this question.

Welcome to Godot Engine Q&A, where you can ask questions and receive answers from other members of the community.

Please make sure to read Frequently asked questions and How to use this Q&A? before posting your first questions.
Social login is currently unavailable. If you've previously logged in with a Facebook or GitHub account, use the I forgot my password link in the login box to set a password for your account. If you still can't access your account, send an email to [email protected] with your username.