gweiss Posted April 15, 2021 Share Posted April 15, 2021 Hi I'm using pyro volume as wind to drive hair in Vellum using Pop Advect By Volume in the forces inside vellum I've create a ramp along the x axis on the hair and I want to use this ramp to mask the amount of wind on the hair, but I can't find a way to link it I tried force ramp on the pop advect with vex code to take bbox and create a new gradient there but it didn't work How can I link the ramp to multiply with the amount of wind? Thanks G Quote Link to comment Share on other sites More sharing options...
voxelfox Posted April 15, 2021 Share Posted April 15, 2021 Can you share your scene file? I was working on a similar effect a while back. If I can take a peek at your setup I might be able to guide you through your specific challenges. Quote Link to comment Share on other sites More sharing options...
ryew Posted April 15, 2021 Share Posted April 15, 2021 Using the VEXpression in advectByVolume to multiply by an existing attribute does work (confirmed by enabling and disabling VEXpression to see difference), however hair is sitll hair - if you push an end of it, the rest will bend and twist accordingly unless you've adjusted the hair attributes otherwise - modifying the hair bend and stiffness attributes for the behavior rather than just the forces will likely help more in getting what you're after. odf_hairadvect.hiplc Quote Link to comment Share on other sites More sharing options...
gweiss Posted April 19, 2021 Author Share Posted April 19, 2021 (edited) Thank you ryew! you are right it does work with existing attribute in advectByVolume, I like your simple setup. Edited April 19, 2021 by gweiss Quote Link to comment Share on other sites More sharing options...
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