During the recent conflict involving Iran, social media was full of missiles, smoke, geopolitics and fear. Every video felt loud—except one.
An Iranian musician sat quietly with his tar while sunlight entered through old Persian colored glass windows somewhere in Isfahan. Red light drifted slowly across the wall behind him. Blue settled near his feet. Green touched his hands for a moment and disappeared again.
Nothing in the room moved quickly. Not the musician. Not the camera. Not even the light.
And perhaps that is why people remembered it.
For a few seconds, the room did not feel like architecture. It felt alive.
At first, I thought the video stayed in people's minds because of the contrast. Chaos outside. Calmness inside.
But later I realised something stranger.
People thought they were watching a musician. They were actually reacting to the light.
Human beings understand beautiful light instinctively. Even children do. They walk toward sunlight without knowing why. Certain cafés feel comforting before the coffee arrives. Certain hotels feel expensive before you even notice the furniture.
We think we remember spaces. Most of the time, we remember light.
That realisation stayed with me for days. And slowly, another thought began disturbing me.
Perhaps modern architecture has misunderstood glass completely.
Glass Does Not Let Light In. It Edits It.
Because glass is not transparent.
Glass edits reality before reality enters the room.
Most people think windows are merely openings for light and ventilation. Architects discuss façades. Interior designers discuss marble, veneers and fabrics. Clients spend lakhs selecting textures and finishes.
But very few people stop to think about the one thing touching every surface inside the room every single second.
Light.
No matter how expensive the marble is, if the daylight entering the room feels emotionally lifeless, the entire house quietly suffers.
In residential projects, we talk endlessly about marble, veneers and furniture—but the glass has already edited every single thing we see before we even sit down.
The strange part is that people feel this without understanding it technically. They simply walk into certain homes and say, "Something feels off."
White walls feel slightly dirty. Wooden flooring loses warmth. Skin tones near windows appear pale. The room looks bright, yet emotionally dim.
They keep calling the painter back, changing cushions, moving furniture—without ever suspecting the glass.
And because the discomfort is subtle, people blame everything except the glass.
The Persians Already Knew This
But centuries ago, the Persians already understood this.
Those old Orosi windows in Isfahan were never merely decorative craftsmanship. They were shaping emotion through daylight itself. Morning sunlight entering through red glass created warmth. Blue created distance and silence. Green softened the room almost like memory.
Nothing physical changed.
Only the light changed.
Yet emotionally, everything changed.
What those craftsmen understood intuitively centuries ago, we now measure clumsily with technical terms and lab reports.
Why Modern Architecture Quietly Lost Its Way
The same thing still happens today. Only now, it happens accidentally.
Some glass makes daylight colder. Some quietly shifts white toward green. Some removes clarity so subtly that homeowners spend years inside beautiful homes without understanding why the space never fully comes alive.
This is why two luxury homes with identical interiors can feel completely different.
Not because of furniture.
Because of daylight.
Or more accurately, because of what the glass did to the daylight before it arrived.
And perhaps this is where modern architecture slowly lost its way.
The Science Behind the Feeling — CRI
In the glazing industry, there is a technical way to measure how honest daylight feels. It is called Colour Rendering Index, or CRI — sometimes written as Ra. It describes how faithfully colours appear compared to natural daylight.
Natural daylight is considered close to 100. The closer glass allows daylight to remain near that 90–100 range, the more natural marble feels, the more truthful wood appears, and the more emotionally alive the room becomes.
Buildings became obsessed with controlling heat using dark tinted glass. Technically, it solved a problem. Emotionally, it created a much quieter, more invisible one.
Green tinted glass often creates emotional coldness. Bronze glass changes skin tones and wood textures. This is why a "cool green" façade that looks stylish from outside can quietly drain warmth from your living room inside.
If you choose glass only from an energy-saving or façade-render perspective, you might be paying for a home that looks premium from the street but feels emotionally dull from the sofa.
People slowly adapt to this altered light.
But they never fully escape it.
The Skylight Problem
You notice this most brutally beneath skylights. Because a skylight is not just another window.
It is the sky entering the room.
And when the sky enters through poor glass, the entire room begins living beneath edited daylight every single day.
Marble changes. Wood changes. Paint changes. Even silence changes.
Some rooms feel calm beneath skylights. Some feel strangely heavy.
It took me time to understand why.
Extra Clear Glass — and the Hidden Layer Inside
At first, I thought extra clear glass solved the problem completely. In India many people call it low-iron glass, though most architectural-grade extra clear glass still comes largely from China because India does not yet widely manufacture it at the same optical purity.
Normal clear glass contains iron. That iron quietly introduces a faint green tone most people never consciously notice—until they stand beneath extra clear, low-iron glass for the first time.
Then suddenly something shifts.
White becomes softer. Wood regains warmth. The sky feels closer. The room becomes quieter.
Not brighter.
Quieter.
But even that was not the full story.
Because later, beneath certain skylights, I noticed something uncomfortable. The daylight still felt slightly distant. As if the sunlight entered the room… but never fully arrived.
And eventually I realised the glass was no longer the only thing standing between the sky and the room.
There was another invisible layer inside the laminated glass.
PVB.
Laminated safety glass has a plastic interlayer inside it — usually PVB. Even when the glass itself is extra clear, this interlayer can add a faint milkiness or distance to the daylight. Most people will never notice it technically.
But emotionally, they do.
One skylight feels emotionally open. Another feels faintly dull, heavy or milky despite using "extra clear" glass on paper.
Designing the Emotional Behaviour of Daylight
This is why glazing fascinates me.
People think they are selecting glass thickness, coatings and specifications.
In reality, they are designing the emotional behaviour of daylight.
For me, specifying glass is no longer just an engineering decision. It is an emotional design decision.
And suddenly that Iranian clip makes complete sense again.
Those Persian windows were never trying to control architecture.
They were trying to control feeling.
Modern luxury architecture is chasing the exact same thing today. Only now we use different materials, coatings and technical language to reach the same destination.
Emotion through light.
Perhaps that is why people remembered that small Iranian clip during days filled with war and destruction.
Human beings instinctively remember spaces where light feels emotionally true.
Even in chaos.
Especially in chaos.
And maybe that is the strangest thing about windows.
People think they look through them.
But all their lives, they have actually been feeling through them.
A window is never just a window. It quietly decides how your home feels every single day.
If you are building or renovating, ask harder questions about the glass — not just how it performs on paper, but how its daylight will make you feel every morning.
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