I have an animation where the camera is focused on a table and some experiment is going on. I want a classroom surrounding, the end result being a VR video, where I move my head to see the class as well as the animation going on at the table. Is it possible to render the experiment animation happening on the table with a transparent background (camera in panoramic setting) and then combine it with the classroom scene that I render separately. Otherwise, I'd have to place the table in the classroom and render out all the details of the classroom for every frame of the animation.

The first image is the table on which some experiment related animation will go on. That's the part i want rendered with a transparent background i.e only the table and whatever's on it.

The second image is the panoramic view of the classroom, that I want to render separately and then somehow merge the previous animation with this. enter image description here enter image description here

PS: The scene is downloaded from the blender website for the purpose of explaining my query.

  • $\begingroup$ Not clear enough, can you add some pictures or screenshots $\endgroup$ – Israel Bamidele May 30 '19 at 9:49
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    $\begingroup$ I have included two screenshots and a brief description of what I want to achieve, please do ask for any other missing info that I've not provided that might help you in better understanding how to solve my problem. $\endgroup$ – Infinity Intellect May 30 '19 at 10:32

To render Transparent Video from blender if I got you right Transparent Video

Follow the setting marked with Red box

The Container matters, and the PNG Codec works with transparent video.

And don't forget to thick the Transparent at the below box

If this didn't help, don't hesitate to ask for more.

  • $\begingroup$ Ah yes, part of my problem is solved, thank you. So now I have this video with a transparent background (with the camera set to panoramic for render). Also, I have this one image that is also similarly rendered. I want that one image(which is the classroom image in the question above i.e image 2) to be the background for the entire video that was initially rendered with a transparent background. Is it possible and if so how? $\endgroup$ – Infinity Intellect May 30 '19 at 17:36

To lay the Video clip on the Background

Alpha over The picture above will be the result.

Node Setup

Switch to Compositing, and click on Use Node enter image description here Set it up like this.

Step by step of setting your node enter image description here To get the Viewer

enter image description here To get Alpha Over

enter image description here To add your Image

enter image description here To fit your Image to Scene Size

I use Render Layer, But in your case, you need to load the clip to Motion Tracking since you have rendered it. enter image description here Then you need to Add Movie Clip from the Compositing Panel as indicated, and replace it with my Render Layer Node


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