Photoshop has made it easy to get those warm colors I love. Adobe added a whole set of adjustments that resemble the filters you'd use on your lenses. And, the best part is that they are available as adjustment layers, so you can apply them to your image and then mask out areas you don't want to be effected by the filter.
So, want to add warmth to an image you rendered? On your Photoshop menu bar, click image, then adjustment, and then Photo Filters. You'll get a choice of eighteen filters to use on your image, including several that warm things up. You can vary the intensity of these filters; and if you use Adjustment Layers to add the filter effect, you can apply those filter effects to selected parts of your image by using layer masks. To do this, select any of a number of tools from the toolbox, and using the mouse, select an area where you would like to apply filter effects. The area will be indicated by a dotted line. Then choose Layer on the pull down menu bar, then New Adjustment Layer, and then Photo Filter. Once the filter list comes up, you can choose your filter for that selected area.