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FORWARD+ RENDERING PIPELINE � Depth prepass – Fills z buffer � Prevent overdraw for shading � Used for pixel position reconstruction for light culling � Light culling – Culls light per tile basis – Input: z buffer, light buffer – Output: light list per tile � Shading – Geometry is rendered – Pixel shader � Iterate through light list calculated in light culling � Evaluates materials for the lights 6 | A 2.5D culling for Forward+ | Takahiro Harada 1 2 3 [1] [1,2,3] [2,3]
CREATING A FRUSTUM FOR A TILE � An edge @SS == A plane @VS � A tile (4 edges) @SS == 4 planes @VS – Open frustum (no bound in Z direction) � Max and min Z is used to cap 7 | A 2.5D culling for Forward+ | Takahiro Harada
Page 1 and 2: A 2.5D CULLING FOR FORWARD+ AMD Tak
Page 3 and 4: 3 | A 2.5D culling for Forward+ | T
Page 5: FORWARD RENDERING PIPELINE � Dept
Page 9 and 10: LONG FRUSTUM � Screen space culli
Page 11 and 12: QUESTION � Want to reduce false p
Page 13 and 14: 2.5D CULLING � Additional memory
Page 15 and 16: FRUSTUM CONSTRUCTION � Calculate
Page 17 and 18: LIGHT CULLING � If a light overla
Page 19 and 20: CODE Original With 2.5D culling 19
Page 21 and 22: LIGHT CULLING 21 | A 2.5D culling f
Page 23 and 24: COMPARISON Number'of'*les' 10000" 1
Page 25 and 26: LIGHT CULLING + 2.5D CULLING 25 | A
Page 27 and 28: PERFORMANCE !me$(ms)$ 6" 5" 4" 3" 2

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