Texture with BC7 compression is same file size as uncompressed? (Can't get BC7 compression to work?)

[Raildex]

@anonymous_user_6a619fcd

Okay, what should I search for or articles to look at to learn how to do this? Is this handled in the material editor or texture editor in Unreal?
Or is this handled using other external software? (I’m using" Mari" for texture painting and Photoshop to create textures)

Well, when creating Spec/Roughness/Whatever maps, just make sure they use the full range instead of only whites or only blacks.
In your material you can then do something like this:

With this, you can
A) have more/easier control over the Material’s attributes and
B) you make sure Textures are optimally compressed.

It makes things a bit more difficult when creating the textures, since you won’t have a proper Preview in your tool of choice.

Any particular reason you’re avoiding BC7?

DXT1 compression rate is 1:8,
BC7 compression rate is afaik 1:6