Render object and shadow with alpha

[Koler]

Hi everyone!

I'm facing an issue that I can't seem to solve — maybe someone has encountered a similar problem.

I have an interior scene, and I need to render a chair with an alpha channel and the shadow it casts on the floor. I tried doing this using Render Layers and AOV Groups, but the result I’m getting this way is very noisy, differs in exposure, and the shadows I get through "Black Layer Shadows" appear across the entire frame rather than just on the floor.

I also tried using a Shadow Catcher, but it doesn’t work well for interiors.

I’d really appreciate any help! I’ve attached the scene I’m experimenting with.

Thanks in advance!

scene link https://we.tl/t-GPC7A96eEo

[jayroth2020]

Cannot open this archive...

[Koler]

Cannot open this archive...

try this, pls
https://we.tl/t-GPC7A96eEo