AntiAliasingTechniken

AntiAliasingTechniken is a group of methods in computer graphics aimed at reducing aliasing effects, such as jagged edges, on rendered images. The goal is to produce smoother contours and more accurate appearance of lines, polygons and textures, particularly at lower display resolutions or when viewing fine geometry.

Classical, raster-based approaches include supersampling and multisampling. Supersampling renders the scene at a higher resolution and then downsamples to the target display, delivering high quality but with high performance cost. Multisampling focuses sampling on polygon edges to smooth jaggies with lower overhead, sometimes enhanced by techniques like coverage sampling (CSAA) or extended equivalences (EQAA). In addition, post-processing methods such as MLAA (morphological AA), FXAA (fast approximate AA) and SMAA provide avenues to smooth edges after rendering, generally offering good performance with varying degrees of edge clarity and potential blur.

Temporal Anti-Aliasing (TAA or TXAA) uses information from previous frames and motion vectors to stabilize edges over time. This approach can produce strong anti-aliasing with relatively modest performance impact but may introduce ghosting or temporal artifacts under certain motion conditions.

The choice of technique depends on desired image quality, available processing power, and scene characteristics such as transparency and motion. SSAA yields the highest quality at a steep performance cost. MSAA offers a balanced compromise, while post-processing methods like FXAA, SMAA and MLAA are fast and widely used in real-time applications. Modern rendering pipelines often combine approaches to achieve a practical balance between sharpness, stability and performance.