[3D particle emitter] Z-Fighting? Rendering issue with transparency and other 3D objects

[CLEDU007]

Is there an existing issue for this?

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Enter the name of the extension

3D Particle emitter

Describe the bug of the extension

First of all thank you for this wonderful extension 🙏

There is a conflict between 3D boxes that use transparency and 3D particles. As a result the particles behind the transparent texture are not rendered correctly, see the image below.

On the left, a 3D box with only 1 rendered face with a radial gradiant texture, and on the right two 3D particle emitters :

Steps to reproduce

1. make a 3D box with a png texture, check "enable texture transparency" and place it in the scene
2. make a 3d particle emitter and place it somewhere near the 3D box

You might need to move the camera and/or the objects to see the issue.

GDevelop platform

Desktop

GDevelop version

5.3.201

Platform info

Windows 10

Additional context

I did note the same issue with the 3D sprite extension: here I put a simple 3D white sprite with a 90° rotation on X for demonstration.

here is the texture used for the 3D box