Can i render out a shadow cast from invisible object. Render out on alpha channel

armondtanz · February 2, 2021, 8:57am

So
1:if i wanted to have a figure walking and cast a shadow.
2:Hide the figure but still have the shadow
3:have the shadow on an alpha layer…
4: render out just the shadow?

Is this possible?

I think this would work on a white ground plane , but on alpha would be better.

Any hacks or work-arounds?

Thanks

Anonymous_1b560bb61f78d380de05bb4f40612517 · February 2, 2021, 4:31pm

Hey there, you can try the Render in the Main Pass.It’s in the details panel Details->Rendering->Render in Main Pass.

armondtanz · February 2, 2021, 6:51pm

Thanks, I’ll take a look at that. only just started unreal so just trying to work out how to composite a huge walking army.
Cant get my head around blueprints and nodes so gonna try do it old skool style.
Its a must i have the shadows seprate on an alpha or white b/ground
Thanks for reply

robat1402 · May 30, 2023, 6:22am

Have you resolved this man?

kharnholio1 · May 30, 2023, 7:30am

While searching for a solution to another problem I stumbled across the following:
Activating “Affect Indirect Lighting While Hidden” and deactivating “Visible” on the mesh seem to do what you are looking for but ONLY IN THE EDITOR

I suppose the post process settings and/or some other setting for the play view might do the trick. Maybe this points you in the right direction