RE: What's this error message?

["Halfdan Ingvarsson" <hingvars(at)Softimage.COM>]

If you scale the source object itself, that's fine. It's when using the radius of the particles to scale the instances where you might encounter this error. If the radius goes down to zero, this might happen. The code does filter out zero-sized particles, so I'm not sure how they're slipping through.

 

Also, as of 5.0, there's no need to scale the master or hide it out of view. You can simply tick "Instance Master Hidden" in its visibility props.

 

 - ½

-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf Of Arvid Björn
Sent: Thursday, 06 April, 2006 03:15
To: XSI(at)Softimage.COM
Subject: Re: What's this error message?

That sertainly rings a bell, the docs have this to say:

"The local transformation of the object's tree is ignored when instancing so that you can scale the source objects to 0 or translate them out of view."

Perhaps that's a bad piece of advice then? =)



--
stockholm.postproduction | www.stopost.se

On 4/5/06, Halfdan Ingvarsson <hingvars(at)softimage.com> wrote:

This looks like it is coming from scene pre-processing. Usually it means that there's a transform on an object that has zero scaling, or other such anomalies which means that mental ray cannot create a global->local transform matrix.

 

This might mean that there are zero-sized particles being pushed (they theoretically shouldn't) and used to scale the transform of the instance.

 

 - ½

-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf Of Arvid Björn
Sent: Wednesday, 05 April, 2006 09:52
To: XSI(at)Softimage.COM
Subject: Re: What's this error message?

That's odd, I'm actually only using default phong shaders at this point!
I guess a lot of things can cause this, they do use transform matrices for a lot of things :-)
The message actually dissapeard after I applied the animation clips and removed all
model nulls and mixers from the instanciating group, so it should be related to that.

Thanks
-a

--
stockholm.postproduction | www.stopost.se

On 4/5/06, Bernard Lebel <3dbernard(at)gmail.com> wrote:

I got this message when I used the misss_fast_skin shader on an object
that had interpenetrating geometry (a character sitting, where the
shirt would enter the legs).

The only way I could "fix" this was to remove the interpenetrating
geometry not visible in camera. Also made rendering a LOT faster.


Cheers
Bernard




On 4/5/06, Arvid Björn <arvidbjorn(at)gmail.com> wrote:
> Does anyone know what this is related to? It's a pretty basic scene with
> heavy particle instancing, running on the renderfarm, it's not happening
> locally though!
>
> ...
> SCEN 0.2  warn   072006: cannot invert a transformation matrix
> ...
>
> It just keeps echoing that message, for over 10 minutes now
>
>
> -a
>
> --
> stockholm.postproduction | www.stopost.se
>
>

---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi