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Set Compression/Texture Settings from Blueprint not working

There are all the nodes, but nothing does anything. Screenshot from simple test project attached. It has a texture variable, which sets the texture parameter of a material istance. If I toogle from default compression to HDR, it sets the drop down menu in the texture to default or HDR, but actually does not compress the texture at all to the new setting. Same with texture brightness and basically all texture parameters. I have all the nodes in blueprints to manipulate the textures, but nothing does anything. Is there some well hidden tick or command that I have to use to get this working and manipulate my textures from blueprints during runtime?

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Product Version: UE 4.16
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asked Jun 03 '18 at 01:15 PM in Blueprint Scripting

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