## Effective Removal of Detail for a Multiresolution Viewer: Slide 7 of 12.

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Now when we remove detail by removing wavelets, the geometry part is
easy. We interpolate the extra model vertices to the wavelet we are
going to remove, and then subtract the wavelet's vertex values
from the model.

However, if our intension was to simplify the model so that rendering
would be faster, we have gained nothing: we still have as many line
segments to draw as before. We may be able to combine some of the line
segments, but only if the vertex separating them is not needed by any
of the remaining wavelets.

Now the problem that we deal with is exactly this: we want to make the
model simpler, not just to make it look simpler. But how do we know
when it is safe to remove a vertex from the model?