Thanks for the provided scene. Such behaviour is related to assigned material (please feel free to do a quick test using Forest Tools
and export all scattered geometry to instances. You can find it under Utilities - More ... - Forest Tools
. For more information about it, check our on-line reference guide
. This way you can check that the problem happens during Forest object conversion or not - in this case discard the influence of our plug-in).
Setting the Alpha Source
for used .tga
textures to None (Opaque)
I would suggest you, as I'm not Corona experts, to check / ask on the Corona forum
. Many of their members are experienced users of Forest Pack, and they can suggest you other useful settings.