Object real GLOW?

[pomme]

In SI3D, make things glow has to set the object as costant. and blur the object. Or adjust the complicate MR option window to make object glow. How does XSI make things glow. I want the really MR render glow, not the blur object method. Anyone idea will be helpful. I really need my object to glow, no other choice.

[geoath]

Hi
Select your object and then PROPERTY>GLOW..
Note that this glow is an output shader so if for examble your object is near a reflective surface this glow will not appear in the reflective object.
U can also use the 2d glow from the output shaders..
Hope this helps a bit

[pomme]

how do you get the property page. alt-enter?

[pomme]

nevermind. i got it

[pomme]

it doesn't seem able to cast the glow onto a paticular polygon. or is it has another method. well, i can delete those polys and add another object, shape it as the deleted polys and cast the glow. but it seems very stupid. if there has another method, i really don't want to delete polys.

[geoath]

hi
I tried too to create a cluster of polygons and apply the glow in this cluster but it didn't work..(in the explorer the glow was assigned on this cluster but in the render region was no glow effect)
Maybe this shader doesn't work in sub object level..
I hope someone knows a good way to override this problem..

[pomme]

Thank you anyways.

[atyss]

Bonjour Geoath,

Indeed, my tests proved that you can't put a glow on a sub-component element.

The only workaround I found is deleting the polygons outside the actual cluster, then removing the cluster, then applying the effect on what remains. Not the ideal solution, but an effective one.

Hope this helps
Salutations - Cheers
Bernard Lebel

[geoath]

Hi Atyss

Well from what it seems this the only workaround..i hoped that there would be something similar like "material ID" as in MAX..this is a cool way to assign glows with different settings in clusters of polygons with different ID's..
Anyway, some more work is no problem when u see the results of Mental Ray ..hehe!!
Cheers
George

[atyss]

XSI is still a young product, let him grow.... Just imagine what it will look like at version 3.....

Bernard

[pomme]

This is so sad that XSI doesn't have the feature.

[devdoka]

If you render the object in a separate pass, you can isolate the glow to subcomponents. Basically, you'd be applying a black matte to everything in the default objects partition, then putting the desired subcomponents in a 2nd glow partition of that pass. The blur will process the entire object to which it's applied, but only the non-black areas will show any results of a glow. This could then be composited back into your scene. The black matte applied to the other objects in the scene will properly obscure the glow, so you don't have to worry about bleeding.

As for the material ID, it does exist in mental ray, but you'd have to write a shader to access that information or else render a tag channel and use a standalone tool that understands that format (such as the XSI compositor).

Matt

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Matt Lind
Animator / Technical Director
Softimage certified instructor:
Softimage|3D
Softimage|XSI
speye_21@hotmail.com

[geoath]

Thanks a lot !!!!!..
I'm not a technical guru to write a shader for MR but i'll try the passes and the tag channel way.