Colour and light effects.

When you make a movie, how even discreet lights (lights and colour) influence your viewer is a good thing to keep in mind. Since you can change a whole scene just by using filters, and changing the colours. I'll now show my point by using the same picture with different "colours".

Now, this first room is one of my first ever 3D projects, but it works for this visual explanation.
Firs I'll cool it down by adding blue to it.

And that is just a little bit bluer, but looks like a colder environment.
So if you feel something is wrong, the colour might be the thing. also light.

Is a good way to show what time of day it is.
In our film we let the first scenes be darker than average, and then brighten up, and in the end get darker again. We wanted to get a feeling of time passing, so he would be going around there all day. In retrospect, we could have faded from normal, to orange/red to blue.
If you are using Adobe Premiere, you can find these settings under The effects tab in the bottom left corner, and then in the colour correction menu.
You can make these changes in 3D max as well, but as you might change your mind, its safer to do this when you are editing.
Now, there is another way to use it, it's obvious, but you might not always remember it right away. You could use colour correction for correction. If you have done something wrong, or forgotten to reset a setting, or in our case, we overdid it, and changed our mind. Our first scene was to dark, and we used a mix of light and contrast to get the the setting we was aiming for. Now, This "trick that actually isn't a trick at all" might save you some precious time that you can spend yelling at whoever made the mistake in the first hand, if you mad the mistake yourself, you may fix it before anyone notices, so you won't have to get an ear full.