In the rendering pipeline, what is the primary role of fragment shading?

In the rendering pipeline, what is the primary role of fragment shading?

• A. Fragment shading handles vertex color interpolation.
• B. Fragment shading determines color and lighting for each fragment.
• C. Output merger determines final pixel colors.
• D. Rasterization applies textures to fragments.

Answer: (B)

The fragment shading stage is where the final color for each fragment is determined by evaluating lighting, material properties, and texture data. It takes per-vertex data that has been interpolated across the primitive (like normals, texture coordinates, and colors) and computes the shade for that specific fragment, often by applying a lighting model and performing texture lookups. This per-fragment computation is what produces the pixel-level color you see on screen. The other options mix responsibilities from other parts of the pipeline. Vertex color interpolation is handled during the data preparation and interpolation step before the fragment shader uses the result. The output merger (or blending) comes later, deciding how the fragment’s color combines with the existing framebuffer. Rasterization itself is the step that turns primitives into fragments, but applying textures is typically done inside the fragment shader through texture sampling, not during rasterization.

The fragment shading stage is where the final color for each fragment is determined by evaluating lighting, material properties, and texture data. It takes per-vertex data that has been interpolated across the primitive (like normals, texture coordinates, and colors) and computes the shade for that specific fragment, often by applying a lighting model and performing texture lookups. This per-fragment computation is what produces the pixel-level color you see on screen.

The other options mix responsibilities from other parts of the pipeline. Vertex color interpolation is handled during the data preparation and interpolation step before the fragment shader uses the result. The output merger (or blending) comes later, deciding how the fragment’s color combines with the existing framebuffer. Rasterization itself is the step that turns primitives into fragments, but applying textures is typically done inside the fragment shader through texture sampling, not during rasterization.