I have spent most of the morning trying to find the answer to this. How do I use a .png file with a transparent background on a 1 sided plane in Poser Pro Game Dev 10.0.5.30556? I could not figure it out. Shouldn't this be possible?

In the materials room apply your image as a map in the Transparency and Transparency Edge channels, then set Transparency value to 1 and Transparency Edge value to 1 as in this example and you should now only see the texture without the black areas...

Can't read any of the values with the screengrab reduced that small.

Firefly (Pro2014GameDev) won't acknowledge PNG's alpha. It seems to be defaulting to a black background in the image map preview window. You might get decent results by plugging it into transparency, with falloff set to zero, and be sure to set specular value to zero, or at least restrict the specular with the transmap.

If the trees aren't sufficiently opaque, some math nodes can exaggerate the lightness of the trees and/or the darkness of the alpha.

edit: cross-posted :)

Not working for me? Don't know what I'm doing wrong I am sure it is a transparent .png though.

Firefly does not respect PNG alpha.

Kill the specular (set to zero) or limit it with the image map.

You might try some math nodes to use the image map as a transmap:

You may need to convert it to jpg format for it to work... as seachnasaigh noted, Poser doesn't like png's as transparency maps. You also might want to make a separate black-and-white version for use as a trans-map keeping the color image as your texture...

OK that works but I wish you could just load a trans png and put it on a plane like in every other software. Thanks

No problem... I'm glad we were able to help you out... :)