Cancelling out / Removing Perspective view for specific MeshInstance only

Virilia

Hello,

I am using a "marker" which points to different positions (MeshInstance).

This marker I want to always perfectly face downwards and not be affected by the perspective regardless of where on the screen / camera space I move it.

I can't figure out how to cancel out the camera perspective / "curvature" for lack of a better term from my side. See image for more clarification.

I can not change the Camera as I need perspective view for other elements of the 3d space. The Meshinstance can't be fixed (bill board), I need to be able to rotate it freely, just without the perspective applied.

Anyone has an idea how I could achieve this?

Thanks for any hints!

cybereality

If it's part of the same 3D scene, then it will have perspective. This is built into the camera and I don't think there is a way to override it (even with shaders). However, what you could do is render a different scene with just the arrow/marker into a viewport and then overlay this onto the screen. With the viewport you can have the camera center to the center of the marker scene, so it will not change perspective if moved to the side. At least I think that should work, I haven't tried that set up exactly.

cybereality

Here is a tutorial that might help. https://docs.godotengine.org/en/stable/tutorials/viewports/viewports.html

Basically you want the marker to look like this: The top node can be moved and the child elements will move with it without changing their perspective. Under the viewport you would have the mesh for the marker and a camera. That should work from what I understand.

Virilia

Thanks, that certainly helps, I consider this solved, unless there is a way without Viewports :) :+1: