Load Material From Website dialog cannot load some thumbnails

[rcorre]

Material Maker version:

0f3f520f0dca00a94e919e4e76cc5cda48fae8d2

OS/device including version:

Linux 5.18.10-arch1-1

Issue description:

The Load Material From Website dialog does not show thumbnails for many materials, and prints:

ERROR: Error opening file 'user://website_cache/thumbnail_217.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_216.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_215.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_214.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_213.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_212.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_211.png'.
   at: load_image (core/io/image_loader.cpp:55)
ERROR: Error opening file 'user://website_cache/thumbnail_210.png'.
   at: load_image (core/io/image_loader.cpp:55)

Steps to reproduce:

1. Click "File > Load Material From Website"
2. Type a search term like "ground"

[RodZill4]

MM loads all thumbnails sequentially, it can take some time to load them all. Maybe a good way of fixing this would be to prioritize materials that are displayed in the list.

[rcorre]

Are all the error messages about loading thumbnails expected?

[RodZill4]

Yes, the error message is there in 1.0 (it's not a problem), but has been removed for 1.1.