I Tried To Cull HDRI Backdrop With Blueprints, But Not Working

I want to addd a cull distance to the hdri backdrop, also

I tried to do this with blueprints but still doesn’t happen anything. (I will send a screenshot of my blueprints with this attachment) I’m not sure why this happened. Also need to say I’m a environment designer and I don’t have a good knowledge in blueprints. But need to say I’m using third person character bp as my player. If you know how to fix this please kindly send me the blueprints if you can again. Also I tried by increasing the > value in blueprints, But still not working