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Railroad Track Attach Platform performance

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whitav8

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us-california
Arno and others,
I would like to be able to land a helicopter on these railroad tracks but I gather there might be a performance problem with lots of platform areas. Right now I have about 20 segments of 400 feet or so. I used MCX to add the platforms:
RailsAttachPlats_zpskra5dsjm.jpg

and here is the scene:
RailsAttachPlats2_zpsy9trreuy.jpg


Maybe I can isolate a few rail sections for landing. What do you think?

Thanks for all your amazing tools!

Dave
 
Hi Dave,

I'll bet there is some performance hit, but about 20 platforms should be OK. If they are as straight as it seems, you could make just one big platform for the model, that way you should minimize the performance hit.
 
@arno,
Thanks for the info! Can I use MCX to make that one large platform? (Of course that only works for the straight section of track )

On a different note, I wanted to thank you so much for the LOD creator tool - the models that I was given for the railroad bridge and track sections had as much as 150K triangles and 180K texture vertices. Your LOD Creator allowed me to get below the 65K limit and still have a very good appearing model - there was some corruption of course. I would like to use the LOD creator to make even simpler models for the track sections so that as we get further away from them, I would get much fewer triangles. One thing I don't understand is the distance away that causes the drop to the next lower LOD. I measured the FPS drop for having all 20 sections at full detail and the drop was from 120fps to 60fps - very significant - and since we are trying to use this scene with the Oculus Rift which wants at least 75fps stereo, it is a problem. Thanks much!!
 
The LOD values (in general) relate to the size of the object as displayed on the screen. Theoretically LOD 40 will be displayed when the object is larger than 40 pixels on the screen, although this is only an estimate in my opinion. I find I have to test these in the sim.
 
Yes, you can make one platform in MCX as well. Just don't use the auto platform option in the attached object editor. Instead add a platform and use the length and width attributes to specify the size of the platform.
 
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