Backplate? Replace sky with backplate, or render against black?

Hi Guys

How do you deal with backplates? Typically we have existing drone shots and or still photogaphy we need to use as background.

How can we handle this in Unity? The background in 3D is basically the sky or an HDRI or similar, which works well for lighting, but 99% of the time we need to keep the lighting that setup gives, but replace the backplate with a video or still image.

Is there a solution to this currently?

Alternatively, how can we render against black, without affecting the lighting, so we can comp in the required backgplate in Nuke/Fusion/AE ?

 

Soooo does this section of the forum, Film,TV, Animation and Cinematics hardly have any activity, because everybody is using Unreal for such things?

 

You can use a UI image. I don't recall the settings off-hand, but there is a way to set the UI image as the background and have it fill the screen (I've done it).

 

Sounds good! Would be awesome if you can recall the settings for it.....

 

Looks like I just used a 'screen space' canvas and set the plane to be behind my game objects.

 

Brilliant, works like a charm in URP, thanks!

I'll take a look later in HDRP and DXR how to get a matte out for it in case we want to replace or grade it further in post....

 

Old thread, but thought I'd add that I've tested it with HDRP and DXR, and it works here also

 

How would I go about doing this, but having video as a backplate?

 

Thanks @vladala
This question relates to my alpha AA bug I menton before for recorder. I thought maybe if I could render against the video backplate directly, I would not have to worry about the alpha issue

For the alpha issue, see my BUG Case NO 1423485 and also a lenghty thread related to it:
https://forum.unity.com/threads/recorder-premultiplied-alpha-bug-png-and-exr.1195888/