Why Adding Atmospheric Effects (Like Dust) is Crucial for Creating Jaw-Dropping Grungy Interiors?

Look. You have created an awesome spooky cellar with meticulous lighting setup. Or better yet, you have created an attic. This attic could have been mentioned in Stephen King’s novel. (If you are curious, Stephen King’s attics have always been a massive inspiration for me).

But something is not right about lighting.

Personally, I had a hard time realizing what is not right about my abandoned mansions and creepy hallways.

No matter what I did, the image didn’t come to life. It simply didn’t ignite my imagination. Not speaking about childhood memories. And it didn’t seem real, you know.


Here is my solution, after doing some research and drinking lots of coffee.

It’s dust, my friend. It’s atmospheric effects. And after following this 4-steps tutorial, you will be able to really breathe life into your grungy artworks.

attic dust blender


When you are creating old abandoned interiors, dust in the air is a key to believable image. Just look. These tiny particles, that catch the light, give an enormous boost to the realism of your scene.

These floating particles enable you to see the light shafts.

When you have that feeling of an atmospheric perspective, you actually see dust.

Hollywood long ago embraced this kind of lighting effects. Cinematographers call them a realistically motivated lighting.

The realistically motivated lighting “enables the audience to see where the story is taking place”.

Hollywood Lighting from the Silent Era to Film Noir by Patrick Keating.

Let’s see what you can do to apply this technique to your scene.

teddy bear lonely

aerial perspective blender


Think about air as a third dimensional thing. It has volume, doesn’t it? It has perspective.

You have heard about atmospheric perspective a thousand times. When you create a landscape, you apply it to portray the distance.

But what about the small grungy attic?

I’m sure it’s fine to exaggerate the perspective, when you need it. Dust creates a very thick air, that at times looks almost like a smoke. So why not?

#Blender Tip: Use the mist (or Z-depth) pass to simulate the fog or aerial perspective

blender volume light tutorial


If you want to create a really convincing grungy interior, you should simulate the dust. Suspend the dust in the air, and watch how it traces the light.

What you get are the light shafts.

Light shafts help you to sell the grungy interior to the viewer. This small touch really adds a lot to the realism. William Daniels, american Actor, once said “we try to tell the story with light as the director tries to tell it with action”.

Try it and you’ll see how your lighting gets the realism boost. You are used to see the light shafts in the dusty rooms, aren’t you?

Also, realistically motivated light shafts will enhance your storytelling.


Today, you have a technology at your fingertips. You have access to the tools like Blender – that can do physically correct volumetric effects like scattering and absorption.

If you want to fake it using real-time engine like Unreal or Unity, it’s great too! Even if it’s not a physically correct simulation, it can still look VERY convincing.

For example, you can simulate volumetrics in the Unreal engine by using lit particles (particles, that react to light).

teddy bear render blender

Actually, do you know how to make Teddy Bear in 1 click in Blender?

how to create dust particles


In the attic that you created, the air is super-thick. And full of tiny particles, floating in the air. They catch the sun rays and start to glitter.

In the previous step, you created the light shafts. It’s the base of the volumetric effect. Now let’s add the tiny sparkles here and there.

These freaking tiny sparkles help to add that extra ‘oomph’ to the image. These tiny fireflies create the additional layer of complexity.

Add the sparkles as a finishing touch, and you are good to go.

#Blender Tip: Dust can look like smoke



If you have done everything we discussed, you should already have an awesome image!

What else can you do, to make you attic even more striking?

Post-process your image with a bit of a glare. In reality, this glare effect is a part of light scattering. But who cares, if the post-processing filter looks just as cool?

Make it glow and watch your friends’ reaction. I bet they’ll be impressed.

And don’t forget to share your render with me too.

It’s your turn.

gleb alexandrov


This project is my way of writing a book, with your interest and support.

Every week I publish the tutorial, touching some aspect of digital lighting. Work in progress and other exciting stuff goes straight to social media. So be sure to like (on Facebook) and follow (on Twitter).

Oh, and please share it by clicking the fancy buttons below or above the article. It will mean a world for me, as this project relies on word of mouth type of marketing.