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Softimage Xsi: instances and deformations

Posted: June 06, 2007
I am doing a quick cityscape and need several bridges spanning from one point to another. I did the bridges by modelling one arc and instancing it along the way to keep the scene efficient. I also intended to do something like this with buildings crawling up a ridge, but I didnt expect the problems I am facing now.

Is there a way to deform a number of instanced models by a lattice as if it were a single object ? Right now the individual segments break up when I want the bridge to go up or down....

Instances would really help me out here, the whole scene was started with the idea of "tileable" models. Do I have to go the hard way and script it (like deforming and offsetting the segments with linked parameters or such) ???