Where are the trees?

#1
Hi!
I want to create a little bit autogen over my photo-scenery i created with Sbuilder. I flipped the textures and the houses seem to appear at the correct position, but i cant see any trees i created.
What could be the problem.
Maybe something with the layers.
Hekto
PS:where have the agn files to be, can i place them anywhere?
 
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