RE: Normal maps and particles

["Harry Bardak" <hb_xsimailinglist(at)hotmail.com>]

why not using geometry instance with  grid oriented towards camera ?

now you have a surface where you have normal mapping.


-----Original Message-----
From:	"owner-xsi(at)Softimage.COM" <owner-xsi(at)Softimage.COM>
 on behalf of	"Vince Fortin" <vfortin(at)gmail.com>
Sent:	Wednesday, April 12, 2006 5:34 PM
To:	"XSI(at)Softimage.COM" <XSI(at)Softimage.COM>
Subject:	Re: Normal maps and particles

Understood. But at this point, I'm not sure it's got any importance for most people using XSI particles.

They just wonder why sprites are so unreliable and then yell for hypervoxels in XSI.

I'm sure we understand each other pretty well about this, everybody
wishes for better particles shaders anyway. I just want to make things
clear myself too.

Vincent

On 4/12/06, kim aldis <kim(at)cg-soup.com> wrote:

it probably should, but to make it clear, you're talking about the shader level, not the geometry level. In which case it's the responsibility of the shader, not xsi itself.

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Vince Fortin

Sent: 12-April-2006 17:53

To: XSI(at)Softimage.COM
Subject: Re: Normal maps and particles

Sure. I'm mostly thinking about sprites but it's not like XSI has tons of different particle primitives.
I could be wrong but my experience with other softwares suggests that XSI should be capable of that kind of thing.
Shouldn't it?
Vincent

On 4/12/06, kim aldis <kim(at)cg-soup.com> wrote:

but then the surface generated would be dependant upon application. Water, cloud .... whatever, not on the particle point set itself. How do you generate normals for points in space, there's no reference.

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From: owner-xsi(at)Softimage.COM [mailto: owner-xsi(at)Softimage.COM] On Behalf Of Vince Fortin
Sent: 12-April-2006 17:09

To: XSI(at)Softimage.COM
Subject: Re: Normal maps and particles

So why wouldn't they be treated as normal surfaces? It seems to me that it'd solve a lot of shading issues.
I too vote for bump & displacement.
Vincent

On 4/12/06, kim aldis <kim(at)cg-soup.com> wrote:

But how would you generate normals for a particle system? You need a
surface.

> -----Original Message-----
> From: owner-xsi(at)Softimage.COM
> [mailto: owner-xsi(at)Softimage.COM] On Behalf Of Marc-Andre Carbonneau
> Sent: 12-April-2006 16:35
> To: XSI(at)Softimage.COM
> Subject: RE: Normal maps and particles
>
> You're both right. None of them works. "type mismatch" or
> something like that. Oh well I'm not surprised.
>
> I'll send a mail to support to add that to the long list of
> things we want in our next particle system.
>
> Thanks François and Kim.
> MAC
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM
> [mailto: owner-xsi(at)Softimage.COM] On Behalf Of kim aldis
> Sent: April 12, 2006 11:25 AM
> To: XSI(at)Softimage.COM
> Subject: RE: Normal maps and particles
>
> You might need some vertexnormals too.
>
> > -----Original Message-----
> > From: owner-xsi(at)Softimage.COM
> > [mailto: owner-xsi(at)Softimage.COM ] On Behalf Of Francois Lord
> > Sent: 12-April-2006 15:10
> > To: XSI(at)Softimage.COM
> > Subject: Re: Normal maps and particles
> >
> > XSINormalMap needs a VertexColor cluster property for the
> UV basis to
> > work. This is usually done with Get Property -> Normal. I
> doubt it's
> > possible to use it on particles.
> >
>
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