V-Ray's obsession with realism is driving architectural visualisation into a dead end

Last Friday night, I stopped in front of a newly built office building in Hamburg's HafenCity. The evening light from the Elbe was bleeding across the glass curtain wall, and the colour was truly strange. Neither orange nor pink, a murky gold that's hard to put into words. The thought that came to mind was, "If I rendered this in V-Ray, nobody would believe it."

And that's exactly the problem.

Our industry has long been fixated on a single goal. Renderings that look like photographs. A world where the highest compliment from a client is, "This is a rendering? I thought it was a photo." V-Ray has long sat on the throne in that world, and when I first started out, I was completely taken with its physically based rendering. I'd spend two hours on caustics settings, tweaking glass IOR values to the third decimal place, feeling proud of myself.

But at some point, doubts started creeping in. If the images I create are indistinguishable from photographs, why not just take a photo? I know, you can't photograph a building that hasn't been built yet. But should the value of rendering really stop at "creating a photo of something that doesn't yet exist"?

The Trap of Photorealism

There's a trap you fall into when you obsess over photorealism. Renderings become increasingly "neutral." Everything is clean, the lighting is natural, the materials are accurate. Technically flawless, yet conveying no emotion whatsoever. Architecture is an experience of light, space, and movement. Can an image that looks like a property catalogue truly convey that?

Starting last autumn, I began shifting my primary tool to Unreal Engine. The initial reason was simple: being able to walk through a scene in real time seemed like it would be handy for client meetings. But the more I used it, the more I started seeing other possibilities.

What Style Communicates

Think about the Elbphilharmonie concert hall here in Hamburg. If you render its glass facade photorealistically, it's just a glass building. But if you exaggerate the light reflections, deliberately push the colour palette toward cold tones, and crank the fog density to unrealistic levels, you create the sensation that the building is floating above the Elbe. The resulting image is far closer to what you actually feel when standing in front of it.

Experimenting like this in Unreal Engine is remarkably freeing. A single post-processing volume lets you change the entire mood in real time, and the engine doesn't complain when you set materials to non-physical values. That's different from V-Ray, where a physically "incorrect" setting immediately breaks the output. Unreal is a game engine, so it was never tethered to reality in the first place.

Recently, I took on the visualisation of a residential project on the outskirts of Hamburg, and the architecture firm said they wanted "a warm feeling." In the past, I would have bumped up the colour temperature slightly and lowered the roughness on the wood materials a touch. This time, I tried something different. I laid a subtle film grain across the entire scene and shifted the shadow colour from pure black to a deep magenta. I made the light spilling from the windows about 1.5 times brighter than what would be physically accurate. The result didn't look like a photograph, but the firm's team said, "It makes you want to live in this house." That's the point.

Beyond "Looks Like a Photo"

This isn't me saying "abandon V-Ray." V-Ray is still an outstanding tool for certain purposes. When precise correspondence with reality is required (images for building permit reviews, for example) photorealism obviously makes sense.

But it's a problem when the field of architectural visualisation as a whole treats photorealism as the only measure of quality. Look at the early architectural drawings from the Bauhaus. People of that era used bold colour fields and geometric compositions to convey the atmosphere of a building. Those drawings looked nothing like photographs, yet they were more powerful than any rendering at communicating architectural intent. I wonder if we've forgotten that legacy.

These days, whenever I start a new project, I ask myself, "What feeling should this building give people?" When you start from that question, the direction of the rendering changes completely. Instead of agonising over IOR values, you think about the emotion of colour. Instead of the physical accuracy of materials, you design the narrative of light.

Rendering is communication, not simulation. The moment you recognise that difference, this field becomes a far more interesting place. Next time I walk along the Elbe, I plan to find a way to render that murky gold. Not physically accurate, but exactly as I felt it.