Hi,
I’m new to Blender, I’m checking it out as an alternative to using Unreal for a Cave-like project. Caves are immersive environments using multiple projectors or screens to display multiple views from a single location.
Would Blender be able to do this? I was thinking of a first person model with two cameras, each rendering to separate screens with their viewpoints adjusted to match the geometry of the screen layout.
Hi, that should be possible by using the script on http://www.tutorialsforblender3d.com/Game_Engine/Viewports/Viewport_2.html for Blender 2.49b. For Blender 2.54 use my changed script.
HG1
Viewports_Finished_250.blend (372 KB)
yes, and i think the method above would work. not the best obviously, but i dont kno if blender has the capibilty of game/render output to multiple cards. make a camera setup like the google streetveiw cars (but match your cave obvioulsly!)
sounds cool
That might work, I looked into this recently and seems that it is heavily dependent on how the dual monitors are set up and managed, i.e. if the computer considers them two separate screens or combines them into one desktop.
Im working on a cave aswell, but i would like to know if it’s possible to use a 120 hz beamer to get a cave with stereoscopic support. Using multiple beamers per screen (as needed for polarised based sereoscopic view) is kinda out of the question with a 3 walled CAVE.
On a completely other note; is it possible for blender to render as if the screen is spherical? That way it should be possible to project on a dome like screen.
you can render a spherical screen. idk how well it will work for you but under render settings and above resolution. there is a game frame settings button. press that and select dome. then change the settings to how you see fit 
Yes, you can project to a dome, it’s based on Paul Bourke’s work:
http://wiki.blender.org/index.php/Dev:Source/GameEngine/2.49/Fisheye_Dome_Camera
I’m finding that even on my very old machine I can spread the game render across two monitors without any notable artefacts, so this is pretty promising for my purposes. Not really knowing how to use Blender I have a long way to go, but it looks hopeful. Thanks for the .bled HG1
This looks promising. I installed ATI Catalyst Control Centre and it allowed me to convince windows that the two screens are actually one with a resolution of 2560x1024. Then I can open the blend in blenderplayer with -f and it fills the two screens perfectly.
The idea is to have the screens at 90-deg to each other, so I’ve moved the cameras and it looks almost right, however there’s a problem with lighting… the viewport on the right has an overall darker image. I’ve included the file, could someone tell me why that happens?
Viewports_Finished_249_jk.blend (192 KB)
HI.
I test your setup in blender 2.5 r32012 and work well.
I think that the darker image on the right is related to the position of the light respect the cameras, it is ok for me.
It is ok to the monkey rotate in different direction in the views?
Good work.