 | | | Bump and no bump on same surface in one pass? | Bump and no bump on same surface in one pass? 2005-06-22 - By Alan Jones
Back
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
---
Unsubscribe? Mail Majordomo@(protected) with the following text in body:
unsubscribe xsi
|
|
|