Another new toy! Twisted Brush Tree Studio from Pixarra. More thanks to Philip Staiger at thebest3d.com for telling me about it. With Tree Studio you can quickly create 2D trees of several deciduous and conifer species.
A few trees made in Tree Studio added to the recently-posted image of a de Havilland Otter flying over snow-covered mountains gives it an entirely different look and feel. With a bit of work you would have a very nice forest at feet of the mountains. Tree Studio allows you to adjust the colors of the leaves as I have done here so that the birch trees can be in their autumn colors.
Click on the image for a full-size view.
For added realism a few of the png tree images generated by Tree Studio have been warped with another application.
Here is a screen shot of Tree Studio. The leaf color had been changed from the standard green to yellow. Tree Studios works with layers. A layer for the background, a layer for ground cover if, a layer for the trunk, a layer for the leaves. So that trees in the foreground will appear more realistic I suggest deleting the ground cover layer and adding another leaf layer behind the trunk as in this screen shot.