C++: Deferred Shading vs Forward Rendering

What are the main differences between deferred shading and forward rendering in C++?

Deferred shading processes lighting in a separate pass after geometry is rendered, while forward rendering combines geometry and lighting in one pass. This can lead to performance differences depending on the scene complexity.

Which method is better for real-time applications?

It depends on the application. Forward rendering is often simpler and better for scenes with fewer lights, while deferred shading excels in complex scenes with many light sources.

Can you explain how each method handles shadows?

In forward rendering, shadows are calculated during the lighting pass, which can be more straightforward but less efficient with many lights. Deferred shading allows for more complex shadow techniques since lighting is processed after geometry.

What are the performance implications of using deferred shading?

Deferred shading can be more efficient with many dynamic lights, but it may use more memory due to the G-buffer. It can also struggle with transparency and requires more complex setup.

Are there any specific use cases where one is preferred over the other?

Yes, forward rendering is often preferred in mobile games or simpler applications, while deferred shading is favored in high-end graphics applications like AAA games with complex lighting.