April 2013
Intermediate to advanced
382 pages
11h 42m
English
Content preview from GPU Pro 4
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104 II Rendering
4.3 Tiled Forward Shading: Why?
The main strength of deferred techniques, including tiled deferred shading, is that
over-shading due to over-draw is eliminated. However, most deferred techniques
suffer from the following weaknesses when compared to forward rendering:
• Transparency/blending is tricky, since traditional G-buffers only allow stor-
age of a single sample at each position in the buffer.
• The memory storage and bandwidth requirements are higher and become
even worse with MSAA and related techniques (Section 4.6).
Forward rendering, on the other hand, has good support for
• transparency via alpha blending,
• MSAA and related tech ...
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