Fast Approximate Anti-Aliasing (FXAA) and Temporary Anti-Aliasing (TAA) are two common techniques used in computer graphics to reduce the appearance of jagged edges and other aliasing artifacts in images. They have their own strengths and weaknesses, and which one to choose depends on the specific needs of the application.
FXAA (Fast approximate anti-aliasing) is a post-processing technique that uses a filter to smooth edges. It is very fast and can be applied to a real-time scene, making it a good choice for video games and other real-time applications. However, FXAA can also introduce a slight blur to the image, which can reduce the overall image quality. Also, it may not be as effective at reducing aliasing in highly detailed or complex scenes.
TAA (Temporal anti–aliasing) is a temporal anti-aliasing technique that averages the color of each pixel over time based on multiple frame data. TAA effectively reduces aliasing in moving images, but may introduce some ghost artifacts. Since TAA is multi-frame based, it requires a high frame rate and a good GPU, which makes it better suited for high-end gaming rigs or high-performance PCs.
TAAU (Temporal Anti-Aliasing Upsampling) is an anti-aliasing technique that combines elements of traditional temporal anti-aliasing (TAA) with upsampling. The main goal of TAAU is to improve the quality of the final image by reducing aliasing artifacts while increasing image resolution. Like TAA, TAAU averages the color of each pixel over time using data from multiple frames. However, it also includes an upsampling step that increases the resolution of the image. The upsampling step is performed using a specialized algorithm, such as the super resolution algorithm, which can generate high-quality images with minimal artifacts. TAAU is particularly effective in reducing aliasing in moving images, and can also improve the overall visual quality of the image. However, TAAU, like TAA, may introduce some artifacts and ghosting. In addition, it requires a high frame rate and a good GPU, which makes it better suited for high-end gaming or high-performance PCs.
FSR2 (Fully Screen-Space Reflections 2) is a type of anti-aliasing technique that is used to improve the quality of reflections in computer graphics. This is a screen space technique, which means that it only uses the information that is visible on the screen, rather than simulating the entire scene. FSR2 works by rendering a scene multiple times from different angles and then averaging the results to produce a final image with better reflection quality. This technique is particularly effective at reducing the visibility of jagged edges and other aliasing artifacts in reflections and can be used to create highly realistic images. FSR2 is computationally expensive and requires a powerful GPU for real-time application. It may also not be as effective at reducing aliasing in highly detailed or complex scenes.
FSR2 is less common than other anti-aliasing techniques such as MSAA and TAA, but is used in some advanced applications where the highest image quality is required, such as in some video games, architectural visualizations or in the VFX industry.