How do I "cookie-cut" my world texture only using my existing object? I have a scene with a world texture, light and 3D object.
To create a desired effect, I need to render the silhouette of my 3D object as a &quot;cookie-cut&quot; of my world texture. (Please see picture below)
I am trying to find out what is the compositor node set up to do something like this.
If you render your object with a transparent background, yuor render will have an alpha output in which the object will be white and the background black. In the compositor you can use this output in the input of a &quot;Set Alpha&quot; node which carries the background image you want (a render of the background sky  or directly the image of the sky).