What Are EXR Passes - And Why Should VJs Care?
If you've been looking at high-end VJ content and seen the term EXR passes, and quietly moved on because it sounded technical, this one's for you.
EXR passes are not as complicated as they sound. And once you understand what they give you, you'll understand why serious VJs and touring show designers care about them.
What is an EXR file?
EXR (OpenEXR) is a high dynamic range image format developed by Industrial Light & Magic, the same studio behind Star Wars and Indiana Jones. It's the industry standard for VFX and compositing work because it can store multiple image layers inside a single file, each one a different piece of visual information from the render.
Where a standard video file gives you one finished image per frame, an EXR gives you the raw ingredients that make up that image, separately, and at full quality.
What are passes?
When a 3D scene is rendered, the final image is the sum of many individual elements, the direct light hitting a surface, the shadows, the reflections, the ambient light bouncing around the scene, the glow from emissive objects. A renderer like Octane can export each of these elements as its own separate pass.
Common passes include:
Beauty, the finished, combined render
Diffuse, the base colour of surfaces with no lighting
Light passes, each light source rendered individually
AO (Ambient Occlusion), the soft shadows where surfaces meet
Z-depth, distance from camera, used for depth of field and atmosphere
Normal map, surface orientation data, used for relighting
Crypto matte, object isolation masks for precise selections
Reflection, separated reflections
Each pass is a greyscale or colour image that represents one specific piece of the scene's visual information.
What this means for VJs
With standard VJ loops, what you see is what you get. The lighting is baked in. If the scene is lit warm and you want it cold, you're limited to a colour grade, which changes everything uniformly, not selectively.
With EXR passes, you can relight the scene entirely in post or live, adding, removing, or adjusting individual light sources without touching the rest of the image. You can add atmospheric depth using the Z-depth pass. You can isolate specific objects using crypto mattes. You can make a scene feel completely different from its original render without rebuilding a single frame.
For touring show designers and agency LED creatives, this means adapting content to match a venue's colour palette, a brand's identity, or an artist's visual direction, without commissioning new renders every time.
Do you actually need them?
Honestly, not always. If you're a DJ adding visuals to a club set or a VJ performing with plug-and-play loops, EXR passes are overkill. The SMP and MOD tiers exist for exactly that reason.
EXR passes are for people who need full technical control, show designers integrating content into complex pipelines, agencies producing bespoke LED content for brand events, and VJs who composite and relight material before a tour rather than performing purely live.
If that's your workflow, the CTRL tier is built for you. If it isn't yet but might be, it's worth understanding what's possible before your next big show.
Not sure which tier fits your setup? SMP, MOD, or CTRL, Which is Right for You? →
Mihaly Sipos is a London-based motion designer and visual artist creating festival-grade VJ content for DJs, touring artists, and live productions worldwide.
