Re: [Nuke-users] zDepth maya vs nuke
Yea, thanks Ivan! On Aug 19, 2011, at 5:20 PM, Ivan Busquets wrote: > Nuke's ScanlineRender outputs depth as "1/z", so the data fades into black as > it gets further from camera. > > This is so that anything outside the bounding box (generally black) will > already have the right value for something that's at infinity, so it will > blend nicely with parts of the scene that are far away. > > It sounds like what you're getting from Maya are "real distance" (not > normalized) values. So if you want to bring the two in line, you can use a > ColorExpression and set the depth channel to be "1/depth.z", and attach that > to either the output of your scanline render, or to your Maya renders > (depending on which one you want to match). > > Hope that helps. > > Cheers, > Ivan > > On Fri, Aug 19, 2011 at 5:11 PM, Gary Jaeger wrote: > OK, this seems like it should be so easy but I've never tried to match up the > nuke depth with a depth pass out of maya. I've done a super-simple scene with > just a plane and a camera. In maya the camera is 10 units from the origin > (center of the frame). i.e. a camera slightly up on the Y looking down. I've > rendered this with a depth pass as well as brought in the geometry and camera > into nuke. > > My usual habit is to use a copy node to copy my cameraZ channel into the > default depth.Z nuke channel (mistake?). I'm using the zBlur node set to > "focal plane setup" to visualize my depth. > > I first assumed I could use the same values in the zBlur node but that > doesn't seem to be the case. I can get the focus plane to be at the same > point if I use that Copy node, set the maya zBlur math to be "depth" , and > set the focus plane to be 10. This makes sense. Then for the nuke scene (geo, > scanline render, etc) I set the zBlur math to be far=0 and set the focus > plane to 0.1 for some reason and the focus planes line up. But I need to > adjust the focus plane values in opposite directions. > > it's probably something obvious, but shouldn't these line up? and why > wouldn't the nuke scanline use 10 as it's value for the focus plane? > > Seems like I've gone through all the math options trying (and failing) to > find something consistent. Any help here? > > > . . . . . . . . . . . . > Gary Jaeger // Core Studio > 86 Graham Street, Suite 120 > San Francisco, CA 94129 > 415 543 8140 > http://corestudio.com > > ___ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > ___ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users . . . . . . . . . . . . Gary Jaeger // Core Studio 86 Graham Street, Suite 120 San Francisco, CA 94129 415 543 8140 http://corestudio.com ___ Nuke-users mailing list Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
Re: [Nuke-users] zDepth maya vs nuke
Nuke's ScanlineRender outputs depth as "1/z", so the data fades into black as it gets further from camera. This is so that anything outside the bounding box (generally black) will already have the right value for something that's at infinity, so it will blend nicely with parts of the scene that are far away. It sounds like what you're getting from Maya are "real distance" (not normalized) values. So if you want to bring the two in line, you can use a ColorExpression and set the depth channel to be "1/depth.z", and attach that to either the output of your scanline render, or to your Maya renders (depending on which one you want to match). Hope that helps. Cheers, Ivan On Fri, Aug 19, 2011 at 5:11 PM, Gary Jaeger wrote: > OK, this seems like it should be so easy but I've never tried to match up > the nuke depth with a depth pass out of maya. I've done a super-simple scene > with just a plane and a camera. In maya the camera is 10 units from the > origin (center of the frame). i.e. a camera slightly up on the Y looking > down. I've rendered this with a depth pass as well as brought in the > geometry and camera into nuke. > > My usual habit is to use a copy node to copy my cameraZ channel into the > default depth.Z nuke channel (mistake?). I'm using the zBlur node set to > "focal plane setup" to visualize my depth. > > I first assumed I could use the same values in the zBlur node but that > doesn't seem to be the case. I can get the focus plane to be at the same > point if I use that Copy node, set the maya zBlur math to be "depth" , and > set the focus plane to be 10. This makes sense. Then for the nuke scene > (geo, scanline render, etc) I set the zBlur math to be far=0 and set the > focus plane to 0.1 for some reason and the focus planes line up. But I need > to adjust the focus plane values in opposite directions. > > it's probably something obvious, but shouldn't these line up? and why > wouldn't the nuke scanline use 10 as it's value for the focus plane? > > Seems like I've gone through all the math options trying (and failing) to > find something consistent. Any help here? > > > . . . . . . . . . . . . > Gary Jaeger // Core Studio > 86 Graham Street, Suite 120 > San Francisco, CA 94129 > 415 543 8140 > http://corestudio.com > > ___ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > ___ Nuke-users mailing list Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
[Nuke-users] zDepth maya vs nuke
OK, this seems like it should be so easy but I've never tried to match up the nuke depth with a depth pass out of maya. I've done a super-simple scene with just a plane and a camera. In maya the camera is 10 units from the origin (center of the frame). i.e. a camera slightly up on the Y looking down. I've rendered this with a depth pass as well as brought in the geometry and camera into nuke. My usual habit is to use a copy node to copy my cameraZ channel into the default depth.Z nuke channel (mistake?). I'm using the zBlur node set to "focal plane setup" to visualize my depth. I first assumed I could use the same values in the zBlur node but that doesn't seem to be the case. I can get the focus plane to be at the same point if I use that Copy node, set the maya zBlur math to be "depth" , and set the focus plane to be 10. This makes sense. Then for the nuke scene (geo, scanline render, etc) I set the zBlur math to be far=0 and set the focus plane to 0.1 for some reason and the focus planes line up. But I need to adjust the focus plane values in opposite directions. it's probably something obvious, but shouldn't these line up? and why wouldn't the nuke scanline use 10 as it's value for the focus plane? Seems like I've gone through all the math options trying (and failing) to find something consistent. Any help here? . . . . . . . . . . . . Gary Jaeger // Core Studio 86 Graham Street, Suite 120 San Francisco, CA 94129 415 543 8140 http://corestudio.com ___ Nuke-users mailing list Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
