What is 3D? (Super Simple)

• Think about flat things first, like a drawing on paper or a photo.
• These are 2D (2 Dimensions). They only have Width and Height. They look flat.
• Now, think about real-world objects you can touch, like a cup, a phone, or a chair.
• These are 3D (3 Dimensions).
• They have Width, Height, AND Depth (or thickness).
• This depth makes them look solid and take up space.
• With 3D objects, you can see them from different sides – the front, back, top, bottom, etc.
• On a computer (like in Spline!), "3D" means creating digital objects that look solid.
• You can turn these digital objects around on your screen and view them from any angle.

What are Textures or Materials in 3D?

• So, you have your 3D shape (like a digital sphere or cube). But what does its surface look like?
• Materials (or sometimes called Textures) are like the "skin" applied to the surface of your 3D shape.
• They decide things like:
  • The Color of the object.
  • How Shiny or Dull it is (like shiny metal vs. dull rubber).
  • How Smooth or Rough the surface feels (even though it's digital, it can be made to look rough).
  • If it has a Pattern (like wood grain, brick, or fabric).
• Basically, materials make your plain 3D shapes look like they are made out of specific, real-world stuff (wood, plastic, metal, glass, etc.).