Rendering different objects to different "eyes" of stereoCameraDisplayRegion

Scripting Issues
#1

Hello,
im having some issues with applying camera masks to each eye of stereo camera
i have two copies of a card that will receive different textures and they are masked to two cameras
but then the renderer only renders one of the cards but for both eyes

        sdr = manager.buffers[0].getDisplayRegion(3)

        sdr.camera.node().getLens().setNearFar(1,10000)
        leftEye: DisplayRegion  = sdr.getLeftEye()
        rightEye: DisplayRegion = sdr.getRightEye()
        leftEye.setClearDepth(1)
        leftEye.setClearDepthActive(True)
        leftEye.camera.node().getLens().setNearFar(1,10000)
        leftEye.camera.node().getLens().setFov(69,55)
        leftEye.camera.node().setCameraMask(BitMask32.bit(0))
        rightEye.setClearDepth(1)
        rightEye.setClearDepthActive(True)
        rightEye.camera.node().getLens().setNearFar(1,10000)
        rightEye.camera.node().getLens().setFov(69,55) # change to init var
        rightEye.camera.node().setCameraMask(BitMask32.bit(1)) # change to init var
        #"""

and then in other part of the code I hide the generated cards using the bitmask :


        # set up a stereo cards to apply the numpy texture
        #"""
        cm = CardMaker('cardMaker')
        self.background = NodePath("background")
        # generate cards and attach them to the background node 
        self.cardL : NodePath = self.background.attachNewNode(cm.generate())
        self.cardR : NodePath = self.background.attachNewNode(cm.generate())
        # Set streams  to render in respective camera views
        self.cardL.hide(BitMask32.bit(0))
        self.cardR.hide(BitMask32.bit(1))
        
        self.background.reparentTo(self.xr_Cam.Head)
        self.background.setPos(self.xr_Cam.Head.getPos())

and im getting the weird result (one of the card is visible with two eyes and the other is invisible)

#2

The left and right display regions share the same camera when using a stereo display region. So the second call to setCameraMask overrides the first one.

There is no way I know of to hide an object from one camera only (because, for efficiency, the left/right eyes are culled together). Either use two cameras, forgoing Panda’s stereo system, or you should use some other technique to achieve what you are after, such as multiview textures.

#3

Thank You for tips, i’ve used one multiview texture to achieve the intended result.