Two kinda realistic trees.
I use them for exterior and architectural viz. Especially as background probs they work really well. They're not really high-poly and the materials are procedural, so they're not too bad considering the render time.
I made the trees with the 'Sapling Tree Gen' Addon.
The materials, both bark and leaves are from BlenderKit, as far as I know that should still allow me to share them here with CC-0. (Please let me know, if I'm wrong though.)