Thumbnails for some decals display with incorrect colors/sizing in the develop page and as fully transparent on the asset page/in studio’s “Toolbox” menu. I believe I first started noticing this sometime mid last year. They generally seem to display properly in studio and in the client.
In the develop page:
On the asset page:
In Studio’s “Toolbox” menu:
Example asset: https://www.roblox.com/library/1045834595/cog
Example place: https://www.roblox.com/games/1192949397/Decal-Thumbnail-Test-Place
Browser: Google Chrome, Version 62.0.3202.94 (Official Build) (64-bit)
OS: Windows 10 Home, Version 1709, Build 16299.64