vertexpainted

Vertex painting, also known as vertex coloring or vertex data, is a technique used in computer graphics to store color or other attribute data directly within the vertices of a 3D model's mesh. Instead of using textures to apply color to surfaces, vertex painting assigns a color value to each individual vertex. When the model is rendered, the graphics hardware interpolates these vertex colors across the faces of the polygons, creating a smooth gradient or a distinct color appearance without the need for UV mapping or texture files.

This method is particularly useful for subtle color variations, gradients, or when a simplified workflow is desired. For example, artists might use vertex painting to add a soft ambient occlusion effect, a grime or dirt layer, or to highlight specific areas of a model. It can also be used to store other types of per-vertex data, such as normals for smooth shading, weights for skeletal animation, or even custom shader parameters.

The advantage of vertex painting is its efficiency. Since the data is stored directly in the mesh, it can be faster to process and render, especially for models with a relatively low polygon count or when dealing with large numbers of objects. It also avoids the memory overhead associated with textures. However, vertex painting is less suited for intricate details or complex patterns that are typically achieved with high-resolution textures. The resolution of vertex color data is limited by the number of vertices in the mesh, meaning that fine details can appear blocky or blurry if the mesh is not sufficiently dense.