I'm currently working on a sci-fi game and need some ideas for one of the alien species. They live on a rain forest planet and are one of the most intelligent species in the game. They also need to be pretty humanoid due to technical limitations. They will be added in a later update but I still need to have an idea for what they look like. Sorry there isn't much information to go off of but I actually don't know what else to put here.
Since they live in a humid environment, I am thinking something that needs to be constantly kept moist. Something like a slug-man or toad man. With an oily, scintillating surface that also works as a lung/gills.
Another thing that needs to be kept moist is nasal membranes. So you might as well have the creature's entire body work as a nose. They can taste and smell through every part of their body.
You can go one step further and have this taste/smell power be their primary form of communication. They join hands and emit complicated bouquets to talk to each other. It is hard to develop a vocal language when you have no rigid body parts.
The slug men can use their slime and powerful musclefoot to climb the tall trees in the rainforest in search of the tastiest leaves. Add in a hard shell, and your slug men become snail-men!
If the above image is too inhuman for you, consider something like this:
The antennae on the little green man's head look like the sensory tentacles on a slug or snail. And he has a slimy green skin. Maybe the little green man is evolved from Martian snails?