Re: Bump Mapping and Camera Projections?

["peter boeykens" <peter_b(at)skynet.be>]

by feeding it a vector_state node set to texture vector, rather than a 
texture space generator or lookup.
(no guarantees of course)

vector_state -> texture edit -> 3Dfractal -> scalar2color -> bumpmap 
generator -> bumpmap input

its a mystery why and how this works, and it creates several problems:
you can't select which projection to use.
and you can't use that fractal on the surface. It works for bump only.

So if you want to use your procedural in the diffuse color and in the bump, 
you have to create two seperate chains, one with texture vector for bump, 
one with texture coordinates for the rest, duplicating all parameters 
between all corresponding nodes in both chains. Its ridiculous.

If you try to create a rendertree, combining several types of textures 
(images, 2D procedurals, 3D procedurals) and different projections (eg 
camera projection, UV projection, planar and spatial), you'll notice that 
getting bump to work each time requires a different method.


...





----- Original Message ----- 
From: "Kim Aldis" <XSI(at)kim-aldis.co.uk>
To: <XSI(at)Softimage.COM>
Sent: Thursday, December 07, 2006 3:08 PM
Subject: RE: Bump Mapping and Camera Projections?


Ok, now how do you make it work using a texture generator node? Or for a 3rd
party shader that doesn't have that 'enable bump' toggle on it?

> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> Behalf Of Halfdan Ingvarsson
> Sent: 07 December 2006 13:49
> To: XSI(at)Softimage.COM
> Subject: RE: Bump Mapping and Camera Projections?
>
> Crimminy biscuits, Chris. Having a bad week?
>
> These threads on bump mapping is like my wife asking whether I think
> her bum looks bigger in trousers X. It's a lose-lose situation. There
> is no right answer.
>
> Anyway.
>
> Get a bumpmap_generator node. Plug your texture map into it. Plug it
> into the Bump port on the material. Enable "projection method for bump
> basis". Create a camera projection for it.
>
> That wasn't so hard now was it?
>
> I'd stay away from using the bump mapping features of the individual
> nodes and try to stick with the bump port on the materials. I have a
> voodoo doll of the individual who suggested the bump map settings
> should be on every single texture node. You practically can't see the
> doll now for all the needles.
>
>  - ½
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> Behalf Of Chris Marshall
> Sent: 7-Dec-06 05:50
> To: XSI(at)Softimage.COM
> Subject: Re: Bump Mapping and Camera Projections?
>
> André Adam wrote:
> > Bah, bump mapping through image nodes is such an ugly thing to do.
> > Btw, you don't plug your image node directly into a bump input, do
> > you? That would give plain wrong results...
>
> I'm sure Soft support could help on this one! Specifically Halfdan,
> maybe?
> ;-[
>
>
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