Hello there.

I’m running some tests and came out with an interesting workaround for fulldome productions with Blender. I still can’t completely get away of the seams, but they are pretty much unnoticeable.

Equiangular Fisheye / Truetheta (most common for dome projection):

“Mirror-wise” Fisheye (most popular for photography):

More on different kind of lens/projections here:
http://local.wasp.uwa.edu.au/~pbourke/miscellaneous/domefisheye/fisheye/

the method:

•  get a predeformed mesh UV mapped (sphere, plate, …)
• UV Node (composite)
• linked scenes with camera set to unique and rotated.

It will work nicely only with Blender 2.49a (for a Map UV node fix after 2.49).
To get a load of how it would work for real, I’m posting here the file I used as well. This File contains:

1. MainScene - the main scene, it’s not being rendered. However this is the scene where the camera IPO is setup.
2. MainSceneLeft/Right/Top/Bottom - Linked scenes with the a 90º FOV camera rotating to compose a cubemap.
3. Uvs - a scene with the UV used to remap the forementioned scenes
4. Composite - a node composition using the UVs calculated in of the scene to distort the scenes.

Test file:
http://blenderecia.orgfree.com/blender/dome/dome_rendering.blend

Youtube videos:

• “Mirror-wise” Fisheye (most popular for photography)
• Equiangular Fisheye / Truetheta (most common for dome projection)

This entry was posted on Quinta-Feira, Junho 18th, 2009 at 22:31 and is filed under blender. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.