Rendering Object straight with Alpha Shadows

[AutoactivaGmbH]

Hello guys,

I've been through several Videos about Layer Masks but I haven't found a quick solution to generate images directly without enviroment but with their alpha shadows. I somehow just can't figure it out.

I tried it with a floor and a matte object on it but then the HDRI enviroment shines through. I don't need many fancy layers with lights and so on. All I need is the car (in this example) and it's shadow so I can add it later on in post into every enviroment. Important is that I don't want the shadow with a white floor even though I know it is possible to set the layer to multiply in post but thats not what I need.


Thank you!
AA

[aoktar]

What about "keep environment"? Another option may be render layers.