Table Of Content

v4 Johan Andersson, Rendering Architect, DICE Overview Feature: Performance: › › Deferred Shading Instancing › › Compute Shader Tile-Based Lighting Parallel dispatch › › Terrain Displacement Mapping Multi-GPU › › Direct Stereo 3D rendering Resource Streaming Quality: Conclusions › Antialiasing: MSAA › Antialiasing: FXAA › Antialiasing: SRAA Q & A › Transparency Supersampling › FPS › Fall 2011 › DX11, Xbox 360 and PS3 › Frostbite 2 engine › Developed for Battlefield 3 and future DICE/EA games › Massive focus on creating simple to use & powerful workflows › Major pushes in animation, destruction, streaming, rendering, lighting and landscapes DX11 API only › Requires a DX10 or DX11 GPUs › Requires Vista SP1 or Windows 7 › No Windows XP! Why? › CPU performance win › GPU performance & quality win › Ease of development - no legacy › Future proof BF3 is a big title - will drive OS & HW adoption › Which is good for your game as well!  Switched to Deferred Shading in FB2 › Rich mix of Outdoor + Indoor + Urban environments in BF3 › Wanted lots more light sources Why not Forward Rendering? › Light culling / shader permutations not efficient for us › Expensive & more difficult decaling / destruction masking Why not Light Pre-pass? › 2x geometry pass too expensive on both CPU & GPU for us › Was able to generalize our BRDF enough to just a few variations › Saw major potential in full tile-based deferred shading See also: › Nicolas Thibieroz’s talk ”Deferred Shading Optimizations” Weaknesses with traditional deferred lighting/shading: › Massive overdraw & ROP cost when having lots of big light sources › Expensive to have multiple per-pixel materials in light shaders › MSAA lighting can be slow (non-coherent, extra BW) 1. Divide screen into tiles and determine which lights affects which tiles 2. Only apply the visible light sources on pixels › Custom shader with multiple lights › Reduced bandwidth & setup cost How can we do this best in DX11?

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Switched to Deferred Shading in FB2 › Rich mix of Outdoor + Indoor + Urban environments in BF3 › Wanted lots more light sources Why not Forward Rendering?

Johan Andersson, Rendering Architect, DICE - AMD PDF

56 Pages·2011·8.01 MB·English

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Switched to Deferred Shading in FB2 › Rich mix of Outdoor + Indoor + Urban environments in BF3 › Wanted lots more light sources Why not Forward Rendering?

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Publication Year:	2011
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Language:	English
File Size:	8.01
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