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I'm wondering which of the "math" settings for the Zdefocus node in Nuke would be appropriate for the output of Vray's Zdepth RE? Here are the choices:
direct : The Z value in the depth channel directly controls blur. For example, if Z is 0.5, then the blur size will be 0.5 times the value of the size control (unless this is bigger than maximum , in which case it will be clamped to maximum ).
depth : The Z value in the depth channel is the distance between the camera and whatever is in the image at that pixel.
far = 0 : The Z value in the depth channel is equal to 1/distance. The values are expected to decrease from large positive values close to the camera to zero at infinity. This is compatible with depth maps generated by Nuke and RenderMan.
far = 1 : Near plane = 0, far plane = 1. This is compatible with depth maps generated by OpenGL.
-direct : As with the direct mode, the Z value in the depth channel directly controls blur. In other words, each layer is blurred by the same amount as in the direct mode. However, in this mode, the layers are interpreted as being in the opposite order, so a higher depth value places a layer in front of another rather than behind it.
-depth : The Z value in the depth channel is - distance in front of the camera. This is the same as depth , but the distances are negative to start with.
far = -0 : The Z value in the depth channel is equal to - 1/distance. The values are expected to increase from large negative values close to the camera to zero at infinity. This is compatible with depth maps generated by Maya.
far = -1 : Near plane = 0, far plane = - 1
Since in Vray white is far, I'm thinking it would be "far=1" however I seem to be getting better results with "depth" on the tests I've run. So I'm hoping someone can clear up what the correct math would be. Thanks!
direct : The Z value in the depth channel directly controls blur. For example, if Z is 0.5, then the blur size will be 0.5 times the value of the size control (unless this is bigger than maximum , in which case it will be clamped to maximum ).
depth : The Z value in the depth channel is the distance between the camera and whatever is in the image at that pixel.
far = 0 : The Z value in the depth channel is equal to 1/distance. The values are expected to decrease from large positive values close to the camera to zero at infinity. This is compatible with depth maps generated by Nuke and RenderMan.
far = 1 : Near plane = 0, far plane = 1. This is compatible with depth maps generated by OpenGL.
-direct : As with the direct mode, the Z value in the depth channel directly controls blur. In other words, each layer is blurred by the same amount as in the direct mode. However, in this mode, the layers are interpreted as being in the opposite order, so a higher depth value places a layer in front of another rather than behind it.
-depth : The Z value in the depth channel is - distance in front of the camera. This is the same as depth , but the distances are negative to start with.
far = -0 : The Z value in the depth channel is equal to - 1/distance. The values are expected to increase from large negative values close to the camera to zero at infinity. This is compatible with depth maps generated by Maya.
far = -1 : Near plane = 0, far plane = - 1
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