Well this was just a plain import using crosswalk.
I rebuilt a model that simulates the complexity using 1600 spheres (400 polys each) and
a moving camera in Maya and exported it to XSI using Crosswalk. I removed all crosswalk props
and clusters and applied a lambert shader.
With this model I measure the same difference in speed (using shaded mode):
30-40 fps in Maya and 9-11 in XSI. When you use the HUD to display the poly count you see that it
actually updates based on the camera's frustum - imho this really indicates some kind of viewport optimization.
Anyway, back in the XSI world, this setup plays back very fast when I switch to BB, hide or uncheck the 3D Geometry.
Of course, this is the expected behaviour - but it is not the case in my "real" scene,
so I guess I have to have a look at all the scene items again - tomorrow.
Kai
Am 10/03/08 um 23:34 schrieb "Stefan Andersson" <sanders3d(at)gmail.com>:
>how many model nulls do you have in your scene?
>
>/stefan
>
>
>On 3/10/08, Thiago Costa <thiagocosta3d(at)gmail.com> wrote:
>> well with the geometry hidden is really weird then...
>> just another dumb guess... but is there any weird tangent map/user normal
>> stuff that came with the conversion from maya? if you isolate one object and
>> play and it still slow, then perhaps it's a problem on your scene/objects.
>>
>>
>> On 10/03/2008, Kai Wolter <kaiwolter(at)mac.com> wrote:
>> >
>> > I already checked all this :-)
>> > Tested the scene on two differenct machines - one with a FX1500 and one
>> with a Geforce 6800 - same result.
>> >
>> >
>> > Of course multiple viewports result in a performance hit - so both XSI and
>> Maya were displaying only one viewport *full-screen* on the primary monitor
>> for these tests.
>> > Maybe Maya implements some sort of view frustrum culling that heavily
>> masks the scene graph processing to optimize viewport performance - but this
>> is just an educated guess from what I am observing.
>> >
>> >
>> > Actually, the fact that I still have the speed issue when all the geometry
>> is hidden or not displayed makes me wonder.
>> >
>> >
>> > Kai
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > Am 10.03.2008 um 21:38 schrieb Thiago Costa:
>> >
>> >
>> > Same here... XSI slow down with lots of objects.
>> > Maya is different, it can't handle a single object with a lot of polygons
>> but it goes well with a ton of objects. ( Right now 3dsmax can do it better
>> then Maya + XSI + Houdini togheter :P )
>> >
>> > Dumb question... How many displays you have on your computer? how's your
>> XSI layout?
>> > I found that:
>> > - my nVidia card was set to optimize both displays, and this setting by
>> itself will slow down your fps.
>> > - if you have two views playing OGL at the same time in two displays, this
>> is a major cause of slowdowns too.
>> > 2 views casting OGL can be an Animation Editor or a Dope Sheet and a
>> viewport at the same time. So to have the best performance collapse all
>> panels before playback.
>> > - A single view will give you the fastest fps that XSI can do. I mean...
>> mute the other viewports or just maximize one.
>> > - If you have an external monitor output, it can make your entire desktop
>> slow down too... so turn it off.
>> >
>> > whats your videocard anyway?
>> >
>> >
>> >
>> > On 10/03/2008, Kai Wolter <kaiwolter(at)mac.com> wrote:
>> > > Hi Frank,
>> > > I already did this - actually this was the first I did, but since
>> > > already selecting the geometry was a quite slow (at that time) I
>> > > decided to import each geometry as an object - same result.
>> > > Btw. I am using XSI 6.5 and Maya 8.5 so this is not even related to
>> > > threading.
>> > >
>> > > The interesting thing is it is even slow (12 fps) when all the
>> > > geometry is hidden. A clean scene with just the animated camera yields
>> > > 75 fps.
>> > > Of course I can remove a lot of geometry to make the scene lighter -
>> > > but it is still an issue...
>> > >
>> > > Kai
>> > >
>> > > Am 10.03.2008 um 20:28 schrieb Frank Lenhard:
>> > >
>> > >
>> > > > i found that thousands of objects, no matter what they are or how
>> > > > complicated they are, slow down xsi a lot.
>> > > > try merging all these objects into a couple single ones and
>> > > > playback....
>> > > > just a try...
>> > > >
>> > > >
>> > > > ciao
>> > > > franky
>> > > >
>> > > >
>> > > > Monday, March 10, 2008, 7:43:27 PM, you wrote:
>> > > >
>> > > > KW> Hi,
>> > > > KW> I have exported a heavy set from Maya to XSI (approx 360.000
>> > > > triangles / 2600 objects).
>> > > > KW> All objects are static, there is just an animated camera in the
>> > > > KW> scene which frames approx. 10% of the geometry in the scene.
>> > > > KW> When I play back the scene in Maya with that camera I have approx
>> > > > KW> 40 fps - in XSI I have 12 fps. Just to make it clear, there are no
>> > > > KW> events, no operators, no materials, no cluster data and the frame
>> > > > KW> rate just changes marginally when I switch between shaded, wire,
>> > > > BB or even hide the objects (!).
>> > > >
>> > > > KW> However when I frame all objects in Maya I end up having approx.
>> > > > KW> the same frame rate - so my first guess would be the frustrum
>> > > > KW> culling in Maya is more efficient....
>> > > >
>> > > > KW> Hopefully I am just missing something...
>> > > > KW> Any Ideas are much appreciated.
>> > > >
>> > > > KW> Kai
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > KW> ---
>> > > > KW> Unsubscribe? Mail Majordomo(at)Softimage.COM with the following
>> > > > text in body:
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>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
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>>
>
>
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