In deferred shading, anti-aliasing is more challenging compared to forward rendering due to the way shading calculations are deferred until after the geometry is processed. This can lead to issues with maintaining edge clarity, as traditional multi-sample anti-aliasing (MSAA) is not directly compatible with deferred shading's G-buffer approach. Here are some common techniques used to manage anti-aliasing in deferred shading:

1. Post-Process Anti-Aliasing: Techniques like FXAA (Fast Approximate Anti-Aliasing) or SMAA (Subpixel Morphological Anti-Aliasing) are applied as a post-processing step. These methods work by analyzing the final image and smoothing out the edges, without requiring changes to the rendering pipeline.

2. Temporal Anti-Aliasing (TAA): This method uses information from previous frames to smooth out edges. It can effectively reduce aliasing by blending pixels over time, which is particularly useful in scenes with motion.

3. Screen Space Anti-Aliasing (SSAA): Although computationally expensive, SSAA renders the scene at a higher resolution and then downsamples it, which inherently reduces aliasing. However, due to its high performance cost, it's less commonly used.

4. Hybrid Approaches: Some engines use a combination of techniques, applying MSAA to specific buffers where possible and then using post-process methods to handle the rest. This hybrid approach can offer a balance between performance and quality.

5. Custom Shading Techniques: Developers might implement custom shading techniques that specifically address aliasing in the deferred context, such as selective supersampling or edge detection algorithms tailored to their specific needs.

These techniques help manage aliasing in deferred shading, each with its trade-offs between quality and performance. The choice of method often depends on the specific requirements and constraints of the project.