A quick test shows that v3b21 performs VERY well.
Image 1: glass is transparent, mirror reflection is good, shiny surfaces show correct. Only a bit of moire in top-left corner of mirror, but that's why I picked that green texture. I'll see if I can make some more scenes for further testing.
Image 2: visible are the window and tree, the firefighter, three light bulbs that illuminate the scene.
Image 3: here too everything seems just fine. I only see one problem: the tulips looks so nice, that I'm afraid they won't last long...
Hans