This plugin allows you to create and save textures to Content Browser from the Thumbnail of an asset. You can use this on any asset that supports thumbnail rendering including Static Mesh, Skeletal Mesh, Blueprint Actors, Niagara, Widget Blueprints, Materials and even third-party plugins that has custom thumbnail rendering. You can also select multiple different (or same) assets and generate textures. It's easy as it is.
IMPORTANT INFO: The generated textures will NOT have any transparency on them and will have the default background.
Update 1.1:
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Added support for setting resolution for the generated textures.