Custom Trees Unaffected By Fog

[Kenito]

Hey all, I've been out of the loop for a while so I'm probably missing something important here:

I've been using this wonderful custom tree made by Chriz. for my campaign. However, as you can see in the image below, these trees are unaffected by fog. Kind of a negative thing to say, but I think the trees may actually have some sort of strange fullbright skin. Why won't they cooperate?

I tried replacing the model of multiple default WC3 tree destructibles with the model and the same thing happens. Any idea why? Do I need to change something in object properties when swapping the model?

 

[2-P]

That's a model problem. You could request it to be changed (fixing it shouldn't be a big deal) but chriz isn't active anymore, so there's not much hope.

 

[Kenito]

Ah, well. Do you know the nature of the problem? Or even better, know any tree models (with the hit/death animations) in similar visual style?