The watch has shape and lighting — now Eon changes what it's made of. That's the job of a material.
What's a material?
A material tells the computer how a surface should look — shiny metal, soft plastic, clear glass. Same shape, totally different feel.
Eon opens the material panel, clicks + to add a new material, and finds it set to the default ("Principled BSDF"). From the choices — metallic, glossy, diffuse, glass — he picks Glass.
Add light, get magic
Glass only looks amazing when light plays through it. So Eon grabs the light in the scene and moves it around, watching reflections and sparkles shift. The watch starts to look like a tiny snow globe — clear, glowing, and real.
Why it takes a second
Glass is one of the hardest things to render, because the computer has to calculate how light bends and bounces through it. So the render takes a moment — that wait is the computer doing serious light math just for Eon's watch.
Try it
Find something glass or shiny and tilt it under a lamp. Watch how the reflections move as the light changes. That's exactly the effect Eon is creating in 3D — material plus light equals magic.