RE: glow ignored in reflections - known XSI 5.1 limitation?

Date : Mon, 19 Jun 2006 14:23:11 +0100
To : <XSI(at)Softimage.COM>
From : "kim aldis" <kim(at)aldis.org.uk>
Subject : RE: glow ignored in reflections - known XSI 5.1 limitation?
Sorry, thought you meant having the output shader glow appear in reflections.



> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> Behalf Of Tim Leydecker
> Sent: 19 June 2006 13:43
> To: XSI(at)Softimage.COM
> Subject: Re: glow ignored in reflections - known XSI 5.1 limitation?
> 
> > I donÂt know. Would like to have similar functionality anyway, tho.
> 
> Since Kim asked, and my brain hurts anyway...
> 
> IÂd welcome if the "custom" arealight type would be made available in
> the XSI interface, youÂd then pick the object as a custom light, the
> volumic takes the shape as itÂs input and then things "glow"
> beautifully.
> 
> But as I said before, Jason does a plugin, his implementation seems to
> work allready and probably also exceeds anything I can think of
> currently.
> 
> Cheers
> 
> tim
> 
> 
> ----- Original Message -----
> From: "Tim Leydecker" <BauerOink(at)gmx.de>
> To: <XSI(at)Softimage.COM>
> Sent: Monday, June 19, 2006 2:32 PM
> Subject: Re: glow ignored in reflections - known XSI 5.1 limitation?
> 
> 
> >> How would you make the result of an output shader reflect in a scene
> object?
> >
> > Voodoo?
> >
> > Seriously, my english... IÂm not sure I can get/answer your question?
> >
> > IÂve assigned the Property>Volumic to a light, added a reflective
> material
> > with transparency to a polygrid and did a renderregion, the volumic
> effect
> > appeared in the reflections and was visible from any angle.
> >
> > I guess you mean how one should implement the same functionality for
> > objects?
> >
> > I donÂt know. Would like to have similar functionality anyway, tho.
> >
> > Cheers
> >
> > tim
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "kim aldis" <kim(at)aldis.org.uk>
> > To: <XSI(at)softimage.com>
> > Sent: Monday, June 19, 2006 1:45 PM
> > Subject: RE: glow ignored in reflections - known XSI 5.1 limitation?
> >
> >
> >> How would you make the result of an output shader reflect in a scene
> object?
> >>
> >>> -----Original Message-----
> >>> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> >>> Behalf Of Tim Leydecker
> >>> Sent: 19 June 2006 12:40
> >>> To: XSI(at)Softimage.COM
> >>> Subject: Re: glow ignored in reflections - known XSI 5.1
> limitation?
> >>>
> >>> Logged a suggestion, severity level2/XSI 5.1:
> >>>
> >>>
> >>>
> >>>       Title:  Glow ignored in reflections
> >>>       Description:  The Property>Glow effect is ignored in
> reflections
> >>> and when seen through a semitransparent object, like a window.
> Desired
> >>> behaviour: Assign glow property to objects, render, see glow in
> >>> reflections and through semitransparent objects. Ideally, a
> >>> functionality compareable to the Property>Volumic would be
> implemented,
> >>> allowing to have "glow" on any shape. Probably easiest controlled -
> but
> >>> shouldnÂt be limited to taking the incandescense attribute of the
> >>> objectÂs material as a basis for "volumic glow" computation.
> >>>       Repro Steps:  Create sphere, assign property Glow, render
> region.
> >>> Create polygrid, place between camera and glowing object, assign
> >>> transparent material to grid, renderregion, compare with previous
> >>> render, glow disappeared. Enable reflections on the polygrid
> material,
> >>> tumbe camera to see reflecting object, render region, the
> reflection
> >>> lacks glow. Workaround: place extra light with
> >>> Property>Volumic in scene. Limitation: shape of object supposed to
> glow
> >>> Property>is ignored,
> >>> e.g. this does work for lightbulbs but not for ghosts...
> >>>       Bug ID:  UDEV00223415
> >>>
> >>>
> >>>
> >>> Dumb as I am, I forgot to add the link to Jason BrightÂs 3D glow
> beta.
> >>> Ouch...
> >>>
> >>>
> >>>
> http://www.xsibase.com/forum/index.php?board=12;action=display;threadid
> >>> =25618
> >>>
> >>> Sorry Jason, seems they would best just ask you for the code to
> bundle
> >>> it in the future?
> >>>
> >>> Cheers
> >>>
> >>> tim
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "Tim Leydecker" <BauerOink(at)gmx.de>
> >>> To: <XSI(at)Softimage.COM>
> >>> Sent: Monday, June 19, 2006 12:39 PM
> >>> Subject: Re: glow ignored in reflections - known XSI 5.1
> limitation?
> >>>
> >>>
> >>> > Hi guys, first, the link:
> >>> >
> >>> >
> >>>
> http://www.xsibase.com/forum/index.php?board=12;action=display;threadid
> >>> =25618
> >>> >
> >>> > 3D glow shader, betatesting. No additional subscritions desired
> >>> currently.
> >>> >
> >>> > (at)Andy:
> >>> >
> >>> >> To give you more control, wouldn't it be easier to just do a
> >>> separate glow
> >>> >> pass and blur it in the FXTree? It'd work with reflections too.
> >>> >
> >>> > I?d do that using Frischluft DepthofField/fLair for most things
> but
> >>> > the advantage of the volumic (besides it?s visibility in
> reflections)
> >>> > is that it also works with cameraanimation and objects lights
> going
> >>> > in/out of the frame during a pan/dolly, even for a really large
> >>> volumic
> >>> > effect without having to render opengate/extrapixels or subframes
> >>> > to prevent popping in (as would have happened with a 2D post
> glow).
> >>> >
> >>> > Would just be nice to be able to have the same inplementation for
> >>> > objects, not just lights. Should I log a feature request, asking
> to
> >>> implement
> >>> > volumic render functionality (based in incandescense/intensity)
> for
> >>> objects?
> >>> >
> >>> > For now, bascially, problems are solved using workaound volumic
> in
> >>> > this particular scene on extra lights.
> >>> >
> >>> > Thanks all for the help,
> >>> >
> >>> > Cheers
> >>> >
> >>> > tim
> >>> >
> >>> >
> >>> > ----- Original Message -----
> >>> > From: "Andy Nicholas" <andy(at)andynicholas.com>
> >>> > To: <XSI(at)Softimage.COM>
> >>> > Sent: Monday, June 19, 2006 12:25 PM
> >>> > Subject: Re: glow ignored in reflections - known XSI 5.1
> limitation?
> >>> >
> >>> >
> >>> >> To give you more control, wouldn't it be easier to just do a
> >>> separate glow
> >>> >> pass and blur it in the FXTree? It'd work with reflections too.
> >>> >>
> >>> >>
> >>> >>> Is it a known XSI 5.1 limitation that the Glow effect
> >>> >>> is ignored in reflections? Due to being a posteffect?
> >>> >>>
> >>> >>> Unfortunately, this also happens when you put a
> >>> >>> (semi)transparent object (like a window) between
> >>> >>> the glowing object and camera, which shouldnÅt be...
> >>> >>>
> >>> >>> My current workaround is to use a Volumic on extra
> >>> >>> lights, this effect works even when seen through a
> >>> >>> semitransparent object but is getting pretty dim while
> >>> >>> IÅm still not sure it also appears in reflections.
> >>> >>>
> >>> >>> To make the workaround produce better results,
> >>> >>> is there a way to prevent colorclipping/normalization
> >>> >>> of the volumic effect (creating superwhite instead) and
> >>> >>> a switch for the light to render it "visible"?
> >>> >>>
> >>> >>> Cheers
> >>> >>>
> >>> >>> tim
> >>> >>>
> >>> >>>
> >>> >>>
> >>> >>>
> >>> >>>
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