Thx for sharing your mind on the subject Ciaran. It's added to my to do list.

- Take a look at the cache on file node more in depth (blending, append caches...etc)

Has the opposite I let down the cache on file node when I encountered crashes and corrupted scene. When the cache on file node was sets to Read, Save scene/close and reopen. XSI wasn't able to open the scene, it was a crash at each try.




On 8/15/2012 8:21 AM, Ciaran Moloney wrote:
Well I guess the mixer op isn't as bad as I make out - I guess it's fine for most situations. It's just a bit of a PITA. Mostly I've encountered problems with some renderers, like Dominik has and in the early days I found it to be much less reliable when reading in caches e.g. missing attributes. So I got burned and didn't go back. Mostly I find that mixer workflow quite limiting. I can have a lot more control using cache nodes and have just become used to it. e.g. I can read in multiple caches and do interesting things with the data between each file being read, I can move the cache op into any construction region, can do cool tricks with string attributes etc. But mostly it's just a sense that I know what's going on compared to the mixer.


On Wed, Aug 15, 2012 at 1:11 PM, Dominik Kirouac <[email protected] <mailto:[email protected]>> wrote:

    Hey Ciaran,

    So you don't use the cache manager to load you Sim cache? You use
    the cache on file node instead ?

    Does it means that you can't take advantage of the cachelist when
    you want to load caches for multiple pointclouds ?



    On 8/15/2012 8:03 AM, Ciaran Moloney wrote:
    Don't use the mixer op (ever).


    On Wed, Aug 15, 2012 at 12:54 PM, Dominik Kirouac <[email protected]
    <mailto:[email protected]>> wrote:

        Hey Chris,

        Thanks to bear interest to my problem. I know the way to
        cache pointcloud and add attributes. I did it several time. I
        think it's more a problem related to voodoo magic :)

        I tried to create a repro scn with a simple setup(emit from
        geo, set instance shape, simulate particle) using the same
        instances that I use in  my project, but it don't recreate
        the problem.

        It seems like I do something in my simulation that break the
        link with the instances between the simulation scene and the
        render scene. We are 2 here doing simulation on this project
        and the other guy encounter the same problem with a different
        simulation/scene... but the setup is similar.

        I though it could be caused by the use of a post simulation
        tree for cropping by camera that maybe mixed up the pointID
        or the shape index, but I deleted the post process tree and
        the problem was still there.

        Forcing the shape by adding another icetree over the MixerOp
        on the cached pointcloud works well... in mental ray, but not
        in Arnold. So I'm stuck with a icecache bug that can be
        solved with a workaround not working in arnold :).

        Maybe I can send you my scenes(one simulation and one
        render), but I'm using Exocortex Slipstream, do you have a
        license to be able to simulate the Icetree?




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- Ciaran


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