Instances in MR inherit from the main shader declaration/definition itself. Is the custom lightmap shader only used once in the Softimage scene and all instance inherit from the lightmap or is each instance of the lightmap has it's own UserDataBlob?
On Tue, Sep 25, 2012 at 9:51 AM, Rémi Arquier <[email protected]> wrote: > Hi Daniel, Yes it looks like it is by design. But note that the Scene Root > derive from a X3DObject. > I think the UserDataBlob is exported for scene elements which generate > leaf instances only. > > I just need to export global data for a custom lightmap shader, all shader > instances need that same data, and I don't realy know where to put it on > Softimage side. Nothing very exciting. > > As you seem aware of thoses things, how do you do when you need a global > parameter for a given shader, regarding the spdl parameters ? By "global", > I mean that all shader instances would share the same parameter' value, and > if I would change the value using one of the spdl interface of one shader > instance, the others values of the other parameter instances would change > also. You see what I mean ? > > Rémi > > > 2012/9/25 Daniel Brassard <[email protected]> > >> I think it is by design unfortunately, Rémi, >> >> This feature is only available when the UserDataBlob is nested directly >>> under a >>> Camera<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/Camera.html> >>> , >>> Light<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/Light.html> >>> or >>> X3DObject<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/X3DObject.html> >>> . >> >> >> What I wish would be an ICE UserDataBlob node that we could feed anything >> we want to it! >> >> It look like you are thinking outside the box to have a need for >> userdatablob on scene root! I'm curious! >> >> On Tue, Sep 25, 2012 at 5:19 AM, Rémi Arquier <[email protected]> wrote: >> >>> Hi list >>> >>> I don't know if it is a bug or not, but when I put a renderable >>> UserDatablob on the Scene Root, I cannot get it back in my Mental Ray >>> shaders. I looked into the miArchive and I don't see it (I see it when it >>> is attached to an other X3DObject like object/cam/light, but not when >>> attached on the scene root). >>> >>> Is it normal ? I find it sad since it would be a good place for placing >>> global data for shaders. >>> >>> cheers >>> >>> Rémi Arquier >>> >>> >> >
