Importing project with HDR texture taking too long

[telmotrooper]

Godot version

4.0.rc2.official [d2699dc]

System information

OS: Arch Linux, CPU: i7-3770, GPU: Radeon RX 570

Issue description

In Godot 3, importing a project with an HDR texture of size 4096x2048 was pretty much instantaneous, while in Godot 4.0 RC 2 it takes (in my computer) almost 6 minutes.

For reference, I've prepared two equivalent projects, both have only a 3D scene with a WorldEnvironment, loading the texture as a panorama sky:

I'm not sure if this is a bug or if the default settings for importing textures are way too demanding now. My CD pipeline is timing out when trying to export a Godot 4 project and it's likely that it has to do with this issue.

If this is intended behavior, feel free to close the issue, though I'd appreciate if someone could tell me whether there's something I can do to reduce this import time.

Steps to reproduce

Just load the projects attached.

Minimal reproduction project

godot_projects.zip

[akien-mga]

Duplicate of #72666. This is fixed in RC2 already, but you have to remove the corresponding .import files, or change the import setting manually.

[telmotrooper]

@akien-mga I just generated this project in RC 2.

[akien-mga]

Are you sure that you didn't use RC 1 first on that project before moving to RC 2?

In the MRP, I can reproduce the issue because the casual_day_4k.hdr.import file uses VRAM compression which seems to be very slow to compress, as outlined in #72666.

If I delete that file (and the .godot folder for good measure) and open in 4.0 RC 2, the import is instantaneous, since no compression is done.

[telmotrooper]

@akien-mga Yup, been using RC 2 since it was out and just created the project on it:

If I try generating a new project (in RC 2) and re-creating the scenario, I get the same issue.

[telmotrooper]

@akien-mga Any chance this is related to the Linux build of 4.0 RC 2?

[akien-mga]

I'm using the Linux build of 4.0 RC 2 too.

I can reproduce the issue too when copying main.tscn and casual_day_4k.hdr in a new project. The initial import is fast, but opening main.tscn triggers a new slow import. Somehow the WorldEnvironment must be forcing some import settings.

[Calinou]

Somehow the WorldEnvironment must be forcing some import settings.

This is likely Detect 3D logic, which should be modified to use Lossless compression for HDR textures until the HDR VRAM compressor performance issue is fixed.

A more extreme solution would be to disable Detect 3D entirely for panorama sky textures, but it'll likely cause other issues (such as not having mipmaps, which can cause the sky to look grainy at lower viewport resolutions).

[clayjohn]

Duplicate of #61948