Don't limit yourself to the simply visual while employing sensory description in your story, whether for a character or a place. Consider how a person or location smells, tastes, sounds, and feels. That is about as difficult as sensual descriptive writing gets!
The best way to describe your senses is by using your senses. The more closely you can connect what you know with respect to your characters' perceptions of things around them to what they actually see, hear, taste, smell, and feel, the better your descriptions will be. Remember that people perceive things differently based on their background knowledge, experience, and emotions. So use what you know about your characters to help bring life to your descriptions.
For example, if one of your characters is very hungry, he or she might eat something tasty but also very unhealthy. This description not only uses what we know about human nature to explain why the character ate so quickly but also takes advantage of another of our senses: taste.
Sight, hearing, touch, smell, and taste are examples of sensory details. When you employ sensory details, your readers may directly experience whatever you're attempting to convey, which reminds them of their own experiences and lends your writing a universal feel. Using sensory details can therefore make your story more believable and less abstract.
For example, if you want your reader to understand how it feels to be in love, you could describe your main character's face when they look at their lover for the first time after waiting years for them to arrive at the station house. You could also tell us what it smells like in the room where they first meet, because we all know that certain scents can trigger memories.
Finally, sensory details can help establish setting as well. For example, if you wanted to show that your main character was sitting in a police office when we first met him, you could say that the room had yellow walls and a desk piled high with files. - This would help us understand that this wasn't some fancy hotel where your main character is staying for a few days while they wait for their case to be resolved.
You should never use sensory details simply to fill up space on a page. Instead, find ways to use them that will help your reader understand your character's emotions better.
One of the most important things a descriptive writing piece should accomplish is appeal to all five senses. If you solely appeal to the sense of sight (how things seem), your writing will be flat. These terms may also be used to describe how objects feel, smell, and taste. Written language cannot directly convey any of these sensations, but they can be implied by word choice and syntax.
The five senses are vision, hearing, touch, smell, and taste. Through these senses, we receive information about our environment that allows us to live and function within it. Writing that appeals to all five senses is more interesting to read than that which only appeals to the mind or just the heart.
For example, if you were to write a description of a flower, you would use different words to describe its appearance (i.e., color, shape), where it is located (i.e., garden, field), what kind of plant it is (i.e., rose), and what effect it has on those who come in contact with it (i.e., beautiful). All of this information helps the reader understand the flower better. This description would use all five senses because it describes how the flower feels, looks, sounds, tastes, and smells.
Now, think about how you can use all five senses to write about something that takes place only once.