"tweak" is good, but i dont think that its good in this case smile

I think, that you may find distance between 2 vertexes and count viscosity_scale automatically

For example, if dist_between_vertexes = 1 Quant, then viscosity_scale = 1,
if dist_between_vertexes = 2 Quants, then viscosity_scale = 0.5,
if dist_between_vertexes = 0.5 Quant, then viscosity_scale = 2

Something like this

1st prize: Lite-C and Newton 2.17 by Vasilenko Vitaliy

Newton2 videos: http://tinyurl.com/NewtonVideos
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Latest LiteC+Newton2 version(v23, from 29.10.2009): http://depositfiles.com/files/ae1l0tpro