`PortableCompressedTexture2D` doesn't update in editor when changed

[beicause]

Tested versions

4.5

System information

Godot v4.5.dev.mono - EndeavourOS SMP PREEMPT_DYNAMIC Sun, 23 Mar 2025 17:17:30 +0000 on Wayland - X11 display driver, Multi-window, 1 monitor - Vulkan (Mobile) - integrated AMD Radeon Graphics (RADV RENOIR) - AMD Ryzen 7 4800U with Radeon Graphics (16 threads)

Issue description

In editor when using a tool script to save different PortableCompressedTexture2Ds to the same path, the PortableCompressedTexture2D doesn't update both in inspector and 2d editor.

Steps to reproduce

In the MRP, there is a tool script attached to a Node2D. Try to re-save the PortableCompressedTexture2D by switching the Node2D's switch_save property, then the texture doesn't update. Only if you run the scene or restart the editor.

Minimal reproduction project (MRP)

test_pctex_resave.zip

[Rudolph-B]

I was able to replicate the behavior you described. I believe this is expected/intended behavior since Godot doesn't constantly poll the file system for changes to resources but instead works from cached resources.

If you want this type of behavior, you would need to manually reload the texture for the Sprite2D node in your GDScript, using something like this:

var sprite = get_node("Saved")
var new_texture = ResourceLoader.load(save_path, "", ResourceLoader.CACHE_MODE_IGNORE)
sprite.set_texture(new_texture)

[beicause]

Renaming PortableCompressedTexture can also make it update, but it will additionally generate a duplicate with original filename.
This should not be an expected behavior. I also tried modifying GradientTexture2D in tool script and saving it, and it can update normally.

[Rudolph-B]

Would you say your issue is similar to #24646? or #30302

[timothyqiu]

You can force reimport the file:

EditorInterface.get_resource_filesystem().reimport_files([save_path])

or use CACHE_MODE_REPLACE to update existing instances:

ResourceLoader.load(save_path, "", ResourceLoader.CACHE_MODE_REPLACE)

[pirey0]

Could reproduce in both v4.5-beta1 and v4.4.1 (So this is not a 4.5 regression)

Godot v4.5.beta1 - Windows 11 (build 26100) - Multi-window, 2 monitors - Vulkan (Mobile) - dedicated NVIDIA GeForce RTX 4060 Laptop GPU (NVIDIA; 32.0.15.7270) - 13th Gen Intel(R) Core(TM) i9-13900HX (32 threads) - 47.72 GiB memory

Godot v4.4.1.stable - Windows 11 (build 26100) - Multi-window, 2 monitors - Vulkan (Mobile) - dedicated NVIDIA GeForce RTX 4060 Laptop GPU (NVIDIA; 32.0.15.7270) - 13th Gen Intel(R) Core(TM) i9-13900HX (32 threads)

Running ResourceLoader.load(save_path, "", ResourceLoader.CACHE_MODE_REPLACE) solves the issues in both versions.

I agree that this is currently intended behaviour, but we could add a SaverFlags flag to do or maybe invalidate the cache automatically after save.

[beicause]

By the way, the editor's resource saving also has this issue. If you first create a BoxMesh and then save a PlaneMesh to the same path to overwrite it, the resource will not update anywhere, neither in the inspector nor 3D scene.

At least, the editor's own resource saving should be fixed, although this may be a known issue for a long time (#30302)