Like the title says, the Winter terrset isn't available in the OE for Sq tiles or new terrsets. I tried to work around it by using a winter tree name in the .swa file for a .til but the OE crashes on launch.
If making a terrain tile, it ignores the winter tree after editing the .swa file. Neither "../Trees/wwhitefirspec.srt" or "../wwhitefirspec.srt" worked.
Unsurprisingly, the same thing happens when trying to install one at random in the TE from the tree list, but at least it sees the ETO winter terrset04.
Next, my tree requests for trees from terrset00 to be added to terrset04.
Thanks