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Posts Tagged ‘zbuffer’
Per pixel depth clipping
With my 11bit depth buffer technique in PV3D the primary goal was enabling post processing effects that are only achievable with a depth buffer however at the back of my mind I wondered if depth testing was in some way feasible.
PV3D depth buffer source
Using the same Pixel Bender kernel as my previous depth of field experiment it is possible to achieve depth based fog. Source code for this example included!
PV3D Depth of Field v2
The biggest issue with my past DOF experiments was the lack of depth buffer precision. With my latest PV3D depth buffer implementation providing 11bit precision at the pixel level the past DOF limitations are no longer an issue.
Papervision SSAO phase II
Screen Space Ambient Occlusion is a post processing technique for approximating the shading achieved by ambient occlusion. In this example I implement SSAO for Papervision using a custom depth buffer material and Pixel Bender.
Papervision SSAO preview
An early preview of my Screen Space Ambient Occlusion implementation in Papervision. Utilizing an 11bit depth buffer and Pixel Bender kernel.
Papervision ZBuffer and DOF
One of the features that most modern graphics accelerators support is a ZBuffer (also known as a depth buffer). This can be thought of as an image that provides per pixel depth information. In this experiment I emulate a ZBuffer in Papervision and use it to create a realtime volumetric Depth of Field effect.