Mangrove leaves from far away look too dark

Mangrove leaves from far away look too dark. It makes the Mangrove swamp look terrible.

steps to reproduce:

1.place some maogrove leaves on the ground.

2.place some oak leaves next to these mangrove leaves tomake a reference.

3.fly far away from them and pay attention to these leave's appearence.

Expected results:

Mangrove leaves look normal, just like oak leaves near them.

Observed results:

Mangrove leaves from far away look too dark.