Hi,
If you just want to display a 2D image on screen then you can create a texture quad that takes up the entire window. Here is some sample code:
Code:
tex = viz.add('ball.jpg',wrap=viz.CLAMP_TO_EDGE)
quad = viz.addTexQuad(parent=viz.SCREEN,scale=[12.8,10.24,1],pos=[0.5,0.5,0],texture=tex)