I'm currently having problems rendering transparent glass using Arnold in 3DS Max. Pre-render, the glass behaves fine; it's see through. However, after rendering, the glass reflects the background color and becomes opaque so that if I place a different background color behind my render during post-processing, it doesn't show through what is supposed to be transparent glass.
Please see the Arnold render below.The black part on the lower left side is supposed to be transparent glass
Back in Mental Ray, I had no problem rendering with glass since the outcome is how I needed it to be: the glass ends up being transparent and even if I insert a background color post-render, you can see the color behind the glass as you should. See the two Mental Ray renders I have below: the first one is the render with a transparent background with the second one is the one wherein I inserted a colored background during post-processing. Notice how the glass retains its transparent properties post-render.
Any help in the right direction will be greatly appreciated. Thank you!