Bump Mapping
Bump mapping is a computer graphics technique used to simulate surface detail on 3D models without altering the underlying geometry. It works by perturbing surface normals based on a texture map (called a bump map) to create the illusion of depth, roughness, or small-scale features like bumps, wrinkles, or scratches. This enhances visual realism while keeping computational costs lower than using high-polygon models.
Developers should learn bump mapping when creating 3D applications, games, or simulations that require detailed surfaces but need to maintain performance, as it reduces polygon count compared to geometric modeling. It's particularly useful for real-time rendering in game engines (e.g., Unity, Unreal Engine) and visual effects, where it adds texture to surfaces like stone walls, skin, or fabrics without heavy geometry. Use it in scenarios where visual fidelity is important but hardware limitations or frame rate targets restrict complex models.