Creating a new ImageTexture by script fail, something to do with the size of the image

[Hannyson]

Godot version

4.0.alpha12

System information

Linux (Archlinux)

Issue description

Creating an imagetexture, and initialize it with an image created by a script fails. After initialization, the image size is still Vector2(0, 0). Setting it with set_size_override put the size right, but the image still can't be shown, error "Condition "!tex" is true".

Steps to reproduce

Write a script that creates an imageTexture initialized by an image also created by script, set it via this script to a TextureRect or something else.

Minimal reproduction project

BugImageToTexture.zip

[Chaosus]

You should use static method ImageTexture.create_from_image (without using a ImageTexture.new() constructor). Same reason why #63131 happened and it will fixed in docs by #63127