Image Disappearing When Rotating 3D Model – How to Fix?

🌵 Needle Engine
1

Hi,

I have an image inside a World Space Canvas, which is part of a 3D object. In the first image, it looks fine, but after rotating the model (as shown in the second image), the image appears invisible.

How can I fix this?

image
image1202×619 62.1 KB

image
image1180×495 61.8 KB

2

Hi Ashok,

The issue of your image disappearing when rotating the 3D model may be caused by the canvas or the image not being correctly positioned relative to the camera or the 3D model. Here are several suggestions to fix this:

  1. Ensure Correct Layering: Make sure that your World Space Canvas and image are rendered on the correct layer that is visible to the camera.

  2. Positioning the Canvas: When you’re rotating the 3D model, ensure that the canvas is properly positioned relative to it. You can adjust the position of the canvas to keep it in front of the camera.

    const canvas = worldSpaceCanvas; // Reference to your canvas
const modelPosition = model.position.clone(); // Get the 3D model's position
canvas.position.copy(modelPosition);
canvas.position.z += offset; // Move it slightly forward so it's visible

  3. Camera Settings: Ensure your camera’s near and far clip planes are set properly. If the canvas is too close or too far from the camera, it might not render correctly.

  4. Visibility Settings: If you are using WebXR or some tracking, check if the canvas or the image settings include visibility control when tracking states change.

  5. Canvas Scale and Size: Depending on your scene’s units and how scaling works, ensure the World Space Canvas has the right sizeDelta to display the image adequately.

If the problem persists despite these changes, let me know your project details such as the version of Needle Engine you are using, and any specific behaviors or components related to the canvas, so we can troubleshoot further!

For more tips and details, feel free to check the official documentation and sample projects:

Let me know if you need further assistance!

1 replies left - Get a PRO license for more AI replies.
thread_xez56zShXCrKjek3zqJXwWHJ
Reply to this message to continue the conversation

3

Hi, can you provide a video and more info about the canvas setup and which components you use? It’s not enough information

4

Yeah sure.
Here is the video link: Game creator Ks's Video - Mar 11, 2025

5

This is the canvas setup

image
image584×849 61.6 KB

6

Ah ok, what you’re refering to is Backface culling which is the default behaviour for all materials to save performance.

Try clicking the Add CanvasData button at the bottom of your Canvas component in Unity and enable Double Sided.

7

Still no luck.

image
image589×816 62.2 KB

8

How are your labels setup?

By default the worldspace UI is visible from both sides (using RawImage, Button, Image (Sprite) in this screenshot). What is different in your scene?

image
image1176×620 35.6 KB

image
image1177×659 36.6 KB

9

Hey, sorry for the late reply. By label, do you mean the text inside the blue box?
its legacy text. Its text value is set using a script in run time.

image
image593×873 51.1 KB

10

Also in editor, it appears as expected, but after exporting, the backside becomes invisible when the model is rotated.

image
image488×432 34.2 KB

image
image468×395 38.6 KB

11

Hi, the screenshots I shared are in Needle Engine, sorry if that wasn’t clear. I was using Text+Image/RawImage components as well. So something in your setup must be different - what are you using to display the blue box?

12

Hey, in the video I shared, both the blue and green images have the same canvas settings, with only the sprite inside them being different. The blue box, which is in the source scene, renders correctly, but the green box, which is in one of the child scenes, has backface culling. Any idea how to fix this?

Video: Game creator Ks's Video - Mar 14, 2025

13

Your blue quad is in another scene? Do you load this content using a sceneswitcher or is this just for the video and you actually have two scenes?

I think it’ll save time if you could send a bugreport so we can look at the project directly :slight_smile:

14

Yes it is managed by scene switcher. Blue quad is in the base scene, and green is from the child scene. Will send a bug report shortly

15

Sent a bug report regarding this. Thanks!

16

Hi, seems like the bugreporter can’t handle the multi-scene setup in Unity. Can you give access to the project in another way or try uploading it again without having multiple scenes loaded in your Unity Scene Hierarchy?

I already tried to reproduce the issue by loading the UI in a separate scene with SceneSwitcher but this also works as expected for me

17

Hey, sent u another bug report without multi scenes in editor hierarchy.

1 Like
18

Hi, it should be fixed in one of the next updates, thanks for reporting the bug

19

Looking forward to it. Thanks!

20

Hi, please update to 4.3.1 and let me know if the issue has been fixed for you