Two display regions, without distortion

Code Snippets
1

Hi
After I found that in the example at https://www.panda3d.org/manual/index.php/File:DisplayRegion_1.jpg the nodes are distorted (panda3d version 1.9.3), here is my example (based on the above one and on other code snippets I found), with no distortion:

from direct.directbase.DirectStart import *
from pandac.PandaModules import *
from direct.actor.Actor import Actor
 
base.disableMouse()
 
def makeNewDr():
    dr2 = base.win.makeDisplayRegion(0.1, 0.4, 0.2, 0.6)
    dr2.setClearColor(VBase4(0, 0, 0, 1))
    dr2.setClearColorActive(True)
    dr2.setClearDepthActive(True)
 
    cam2 = render.attachNewNode(Camera('cam2'))
    dr2.setCamera(cam2)
 
    return cam2
 
def makeNewDr3():
    dr3 = base.win.makeDisplayRegion(1,1,1,1)
    dr3.setClearColor(VBase4(0, 0, 0, 1))
    dr3.setClearColorActive(True)
    dr3.setClearDepthActive(True)
 
    cam3 = render.attachNewNode(Camera('cam3'))
    dr3.setCamera(cam3)
 
    env = loader.loadModel('environment.egg')
    env.reparentTo(render)
 
    b = Actor('panda.egg', {'walk' : 'panda-walk.egg'})
    b.pose('walk', 0)  
    b.reparentTo(render)

    b.setX(-25)
    b.setZ(50)
    b.setY(-350)
    b.setH(-135)

    cam3.setPos(-22.5, -387.3, 58.1999)
    return cam3
 
def splitScreen(cam, cam2):
    dr = cam.node().getDisplayRegion(0)
    dr2 = cam2.node().getDisplayRegion(0)
 
    dr.setDimensions(0, 0.5, 0, 1)
    dr2.setDimensions(0.5, 1, 0, 1)
 
    cam.node().getLens().setAspectRatio(float(dr.getPixelWidth()) / float(dr.getPixelHeight()))
    cam2.node().getLens().setAspectRatio(float(dr2.getPixelWidth()) / float(dr2.getPixelHeight()))
 
cam2 = makeNewDr()
cam3 = makeNewDr3()
cam2.reparentTo(cam3)
cam2.setH(15)
splitScreen(cam3, cam2)

# Disable the default DisplayRegion, which covers the whole screen.
dr = base.camNode.getDisplayRegion(0)
dr.setActive(0) # Or leave it (dr.setActive(1))
 
run()

Attached the example with the distortion (distorted.1.png), and the example without the distortions (dist.png)



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