 | | | Bump and no bump on same surface in one pass? | Bump and no bump on same surface in one pass? 2005-06-24 - By Alan Jones
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It's not in the docs. And the ? on the bumpmap node is next to
useless. I figured that one out by trial and error determined to find
out what the purpose of that node was.
Cheers,
Alan.
On 6/24/05, Morten Bartholdy <xsi@(protected)> wrote:
> Great info Alan - I'm not sure I've ever seen this in the docs on bump, but
> then again, it is a while ago I read up on that :)
>
> Thanks!
>
>
> Best regards
>
> Morten Bartholdy
> 3D & VFX Artist
>
>
>
>
> -- -- Original Message -- --
> From: "Alan Jones" <skyphyr@(protected)>
> To: <XSI@(protected)>
> Sent: Wednesday, June 22, 2005 11:04 AM
> Subject: Re: Bump and no bump on same surface in one pass?
>
>
> > Hi Morten,
> >
> > Sorry to chime in so late - computer problems lately. I showed a
> > technique to achieve this at the last usergroup.
> >
> > Use the mixer as suggested and put your shader though a bumpmap (not
> > bumpmap generator) node before it goes into the mixer. Then put your
> > bumpmap generator into the bumpmap node. Anything plugged into the
> > bumpmap node (directly or indirectly) will get the bumpmap from the
> > bumpmap generator attached to it. The rest of the scene won't.
> >
> > You can do this as many times as you like in the one tree. So you
> > could have one bump for diffuse, one for specular, one for reflection,
> > one for .. you get the idea. Also using a ray type switch node you
> > could make the bump not appear in reflections, or not appear in final
> > gathering (really good for speeding up FG calculations) etc.
> >
> > Cheers,
> >
> > Alan.
> >
> > On 6/21/05, kim aldis <kim@(protected)> wrote:
> > >
> > > that little yellow bump, that's the giveaway. ;-)
> > >
> > >
> > >
> > >
> > > __ ____ ____ ____ ____ ____ ____
> > > From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On
> Behalf Of
> > > Morten Bartholdy
> > > Sent: 21 June 2005 15:03
> > >
> > > To: XSI@(protected)
> > > Subject: Re: Bump and no bump on same surface in one pass?
> > >
> > >
> > >
> > > Yes, I keep forgetting MR can't guess I want a color to vector
> conversion
> > > when plugging a texture in to the bump input ;)
> > >
> > > MB
> > >
> > >
> > > -- -- Original Message -- --
> > > From: kim aldis
> > > To: XSI@(protected)
> > > Sent: Tuesday, June 21, 2005 8:57 AM
> > > Subject: RE: Bump and no bump on same surface in one pass?
> > >
> > >
> > > there's not much point in plugging rgb into a bump vector input. You'll
> need
> > > to use the bump generator to convert it sensibly into a vector.
> > >
> > >
> > > __ ____ ____ ____ ____ ____ ____
> > > From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On
> Behalf Of
> > > Morten Bartholdy
> > > Sent: 21 June 2005 00:25
> > > To: XSI@(protected)
> > > Subject: Re: Bump and no bump on same surface in one pass?
> > >
> > >
> > >
> > > I was using a mixer node too - I just think of color 1 as a layer on top
> of
> > > the base color. Actually, I can't reproduce that one. However if I plug
> an
> > > image or procedural texture directly into the bump channel of a Phong
> > > shader, the normals look like they take a hike - the specular is wrong.
> It
> > > will only render a proper specular when I plug the texture node into
> > > ambient/diffuse channels, which is sort of limiting.
> > >
> > > I hope they don't forget revamping bumpmaps for V5.0.
> > >
> > >
> > > - Morten
> > >
> > >
> > >
> > > -- -- Original Message -- --
> > > From: kim aldis
> > > To: XSI@(protected)
> > > Sent: Monday, June 20, 2005 6:35 PM
> > > Subject: RE: Bump and no bump on same surface in one pass?
> > >
> > >
> > > When I tried it I wasn't using layers, I just used the mix node.
> > > . I put one Phong into each of the mix2nodes inputs. What was
> interesting
> > > was that the reflection remained flat where the illumination of the
> surface
> > > was bumped. So I took out the mixer and just plugged a Phong into the
> > > surface with a bump image in the Phong's bump. Again, the reflection
> didn't
> > > bump but the illumination did. As far as I can tell right now, if you
> bump a
> > > phong then it's reflection won't bump. Surely this can't be right?
> > >
> > >
> > >
> > >
> > > __ ____ ____ ____ ____ ____ ____
> > > From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On
> Behalf Of
> > > Morten Bartholdy
> > > Sent: 20 June 2005 17:19
> > > To: XSI@(protected)
> > > Subject: Re: Bump and no bump on same surface in one pass?
> > >
> > >
> > >
> > > Edit:
> > >
> > > Kim you were right - only the order of layering is important! I started
> with
> > > the sublayer with bump as base color and added a reflective coating as
> color
> > > 1 - that makes the reflective coating bumpy too. If I swap the two and
> add
> > > the bumpy Phong to a reflective surface, the reflection is unaltered by
> the
> > > bump, which is what I want. A bit backwards though, but it works :)
> > >
> > > - Morten
> > >
> > >
> > > -- -- Original Message -- --
> > > From: kim aldis
> > > To: XSI@(protected)
> > > Sent: Monday, June 20, 2005 4:37 PM
> > > Subject: RE: Bump and no bump on same surface in one pass?
> > >
> > >
> > > 2 phongs into a mix2colours node -> surface?
> > >
> > >
> > > __ ____ ____ ____ ____ ____ ____
> > > From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On
> Behalf Of
> > > Chris Marshall
> > > Sent: 20 June 2005 15:41
> > > To: XSI@(protected)
> > > Subject: Re: Bump and no bump on same surface in one pass?
> > >
> > >
> > > There's a shader called XSI-clear-coat on XSI base. Sounds like it might
> do
> > > the job for you.
> > >
> > >
> > > Morten Bartholdy wrote:
> > >
> > > Hi List,
> > >
> > >
> > > I am shading an object which has a bumpy glossy reflective surface and a
> > > smooth layer of transparent laquer covering it, effectively rendering
> the
> > > surface smooth and reflective.
> > >
> > > I can't seem to create this combination in one pass on the same surface,
> so
> > > I wonder if anyone can offer a trick or workaround to make it work?
> > >
> > > TIA!
> > >
> > >
> > > Best regards
> > >
> > > Morten Bartholdy
> > > 3D & VFX Artist
> > > cell +45 2169 54676
> > >
> > > --- Unsubscribe? Mail Majordomo@(protected) with the following text in
> > > body: unsubscribe xsi
> >
> > ---
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> >
> >
>
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