1. By description - We've all read scenes where the setting takes on the characteristics a writer wants to portray. A bright sunny day can show a character acting one way and also a gloomy one the other. The scene can also show that the character's mood is in conflict with the bright day, the antique furniture or what ever description you choose to use. Just don't overwrite the description. I once remember while doing some reading for a publisher, one of the manuscripts had an entire chapter describing a cr trip along the California coast. Beautifully done but it really had no purpose.
So deciding the purpose of the descriptive scene or partsof a scene may have one or more purposes. A little foreshadowing can be shown. The character can be defined and shown. Also there can be a complication coming that the setting will play a part in creating. A funeral could do this very handily.