Re: Sprites and environment maps refraction

[Sam Cuttriss <sam(at)janimation.com>]

yeah this drives me mad too.

also using a sprite as a reflecting element will occlude the passes environment with black.
the only way to get round that was to apply the enironment shader to the sprite refecting element as well.

_sam

SAM CUTTRISS
3D AFICIONADO

Morten Bartholdy wrote:

Try this one:

 

http://colorshopvfx.dk/XSI/Test_sprite_watersheet_01.rar

 

- Morten

 

 

 

----- Original Message -----

From: guillaume laforge

To: XSI(at)Softimage.COM

Sent: Monday, April 10, 2006 6:32 PM

Subject: Re: Sprites and environment maps refraction

Can you send a repro-scene ? Works fine here as far as I understand ?

On 4/10/06, Morten Bartholdy <xsi(at)colorshopvfx.dk> wrote:

No it removes the refraction entirely.

 

- Morten

 

----- Original Message -----

From: Alan Jones

To: XSI(at)Softimage.COM

Sent: Monday, April 10, 2006 6:09 PM

Subject: Re: Sprites and environment maps refraction

 

Guillaume's suggestion didn't fix that?

On 4/10/06, Morten Bartholdy <xsi(at)colorshopvfx.dk > wrote:

Actually the problem is a bit worse even - see here:

 

http://colorshopvfx.dk/XSI/Sprite_Watersheet_Edge.jpg

 

Notice how the transparent part of the Sprite shader affects what's behind.

 

 

- Morten

 

 

 

----- Original Message -----

From: Morten Bartholdy

To: XSI(at)Softimage.COM

Sent: Monday, April 10, 2006 5:34 PM

Subject: Re: Sprites and environment maps refraction

 

No Alan I'm not using the rasterizer atm.

 

You can see the problem here:

 

http://colorshopvfx.dk/XSI/Sprite_Watersheet.jpg

 

What I think I would like is the Environment node to have Background Intensity split into refracted and non refracted rays - perhaps there is a way to do that in the Render Tree but I haven't found it yet.

 

- Morten

 

 

----- Original Message -----

From: Alan Jones

To: XSI(at)Softimage.COM

Sent: Monday, April 10, 2006 5:11 PM

Subject: Re: Sprites and environment maps refraction

 

If I had to take a guess it'd be that you're using the rasterizer. Soft hasn't updated their shaders to ensure they all work properly with the rasterizer.

I assume you mean you see what's behind an area which should be opaque right?

Cheers,

Alan.

On 4/10/06, Morten Bartholdy <xsi(at)colorshopvfx.dk > wrote:

I have a transparent object, a sheet of water, where use a sprite shader to clip the edges of the water sheet, creating a nice animatable edge using animated mattes. Works fine, but I use an environment map for reflection and refraction, and problem is can see the environment map through the part of the water sheet which is supposed to be clipped by the matte through the sprite node, which I don't want. Makes sense? I was looking at the Ray-Type switch but it doesn't seem to provide what I need.

 

Does someone have a tip they can share?

 

- Morten