David Mullen ASC
Moderator
Well, that's a problem -- the faces -- because whether you add the warmth in post or with a filter on the camera, it affects everything in the frame including faces. Not really a trick around that short of painting people's skin blue-ish so that it becomes normal after the color-correction.
Though another idea might be to forget skintones in the wider shots, let them go orangey, but float a blue gel on a frame over them in close-ups to reduce the amount of warmth.
Unless you want to tediously track hand-drawn or oval windows in post over every face to shift the color separately from the background.
Grads darken the sky, or whatever they are over, they don't darken the ground (unless they are covering the ground.) Generally that's OK because the sky is hotter than the ground anyway.
But if you want a more subtle color shift without the brightness shift, one trick is to sandwich a colored grad with an ND (grey) grad going the opposite direction (upside-down compared to the first grad) so that they blend from color to grey instead of color to clear.
Grads though won't work in every shot, they tend to only work in wide static shots with a constant horizon line, hopefully above the actors heads.
You may want to compare two Mars movies, "Mission to Mars" and "Red Planet". "Mission to Mars" spray-painted a constructed outdoors landscape set reddish and then used copper-foiled reflectors to fill-in shadows with copper light (they also timed the image in post to look more orangey, and they did a lot of sky replacement). "Red Planet" shot out in the desert with sepia-ish or tobacco-ish filters.
Though another idea might be to forget skintones in the wider shots, let them go orangey, but float a blue gel on a frame over them in close-ups to reduce the amount of warmth.
Unless you want to tediously track hand-drawn or oval windows in post over every face to shift the color separately from the background.
Grads darken the sky, or whatever they are over, they don't darken the ground (unless they are covering the ground.) Generally that's OK because the sky is hotter than the ground anyway.
But if you want a more subtle color shift without the brightness shift, one trick is to sandwich a colored grad with an ND (grey) grad going the opposite direction (upside-down compared to the first grad) so that they blend from color to grey instead of color to clear.
Grads though won't work in every shot, they tend to only work in wide static shots with a constant horizon line, hopefully above the actors heads.
You may want to compare two Mars movies, "Mission to Mars" and "Red Planet". "Mission to Mars" spray-painted a constructed outdoors landscape set reddish and then used copper-foiled reflectors to fill-in shadows with copper light (they also timed the image in post to look more orangey, and they did a lot of sky replacement). "Red Planet" shot out in the desert with sepia-ish or tobacco-ish filters.