Factorio Forums

What did you do?
move left
What happened?
shadows popped in at maximum zoom out
What did you expect to happen instead? It might be obvious to you, but do it anyway!
Shadows not to pop in
Does it happen always, once, or sometimes?
seems to always happen, if the tree is big enough
If you can reproduce the issue provide the exact steps!
move left, look at the left edge of the viewport

Thanks for the report. That will be one of the mods you're using making a tree shadow larger than the maximum supported render area and not updating the maximum supported render area. You should be able to go look at that specific tree and report the issue to the mod author.