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Old 05-19-2013, 06:51 PM   #1
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kws, Austria
Join Date: Dec 2007
Posts: 59
instancer low vs high poly based on camera distance

hi there,
i have to create the good old butterfly-swarm. so i got a high-poly butterfly (arround 30000 verts) and a low-poly version (ca 2000 verts) from our modeler.

now i remember something about polygon proxy (or similar) from an old gnomon dvd. when i remember it right, the two versions of the model were treated as one but based on camera distance it displayed and rendered the one or the other version. can you tell me something about this? for what expressions should i google?

an other methode i could think of was to instance my animation sweep twice (low and high play version) and write the instancer object index expression myself. for that i'd need the distanceToCameraPP for my particle system. could you help me with that?

Old 05-19-2013, 07:20 PM   #2
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Old 05-19-2013, 08:16 PM   #3
kweso's Avatar
kws, Austria
Join Date: Dec 2007
Posts: 59
it does indeed! thank you very much!
Old 05-20-2013, 05:35 AM   #4
kweso's Avatar
kws, Austria
Join Date: Dec 2007
Posts: 59
when i render a short animation with the original object (no instancer, no particles yet) where the cam slowly moves towards the flapping butterfly, the last visible position of the low-poly-wings stays visible, not animated, while the high-poly-version continues flapping...

any ideas, why mental ray would do this?

Old 05-20-2013, 05:35 AM   #5
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