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Question by Fr2 · Oct 22, 2016 at 08:56 AM · skyboxskyboxes

Can I create skybox images from a scene within Unity?

I thought I saw something in the Unity docs about this, but can't find it again...

What I'd like to do is create a complex scene in Unity (e.g. containing distant buildings, mountains, etc) and then be able to generate a set of images from this scene (cube projection) to use to create a new skybox for a different project/scene. I could use Blender to create a skybox, but for consistency it would be great to create it in Unity.

Any ideas?

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Answer by tanoshimi · Oct 22, 2016 at 10:55 AM

Try my blog entry under the section "creating dynamic cubemaps" https://alastaira.wordpress.com/2013/11/12/oooh-shiny-fun-with-cube-mapping/

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avatar image Fr2 · Oct 23, 2016 at 09:35 AM 0
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Thanks! This gets me about 80% of the way there but I can't get all the images to align properly in the Skybox. The two on the X axis don't join correctly. I've set each imported image to "clamp" before adding them to the Skybox, and have experimented with the camera's FOV in the script. Great script, though, will keep on experimenting.

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Answer by Fr2 · Oct 23, 2016 at 12:41 PM

To get this working I used Camera.RenderToCubemap:

https://docs.unity3d.com/ScriptReference/Camera.RenderToCubemap.html

For the target cubemap I set the face size to 1024. Inside Unity it's just a case of clicking play, and then going to GameObject > Render into Cubemap.

Create a skybox, and choose "cubemap" as the texture, then drag the cubemap into the skybox.

To extract actual PNG images of each of the cubebox faces, you can use the suggestions on this thread:

http://answers.unity3d.com/questions/9189/how-can-i-extract-the-individual-faces-from-a-gene.html?page=2&pageSize=5&sort=votes

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