Alan Monroig Posted October 19, 2020 Share Posted October 19, 2020 I need help solving this issue! it is driving me crazy… When I increase the Rest Length attribute of a pressure constraint (using vellumconstraintproperty and restlengthscale parameter). The object moves erratically, unstable… I have tried with different resolution geometry, sim scale, substeps, constraint iterations, smoothly animating the attribute, etc.. Do not know how else to troubleshoot. Thank you in advanced, Alan vellum_problem.hiplc Quote Link to comment Share on other sites More sharing options...
Noobini Posted October 19, 2020 Share Posted October 19, 2020 look here: https://www.sidefx.com/tutorials/advanced-vellum-workflows-h17-masterclass/ last chapter is where inflation is shown. Go get the pbd_inflatable_toy file and study it. here's a quick adaptation. vellum_problem_fix.hipnc Quote Link to comment Share on other sites More sharing options...
Alan Monroig Posted October 23, 2020 Author Share Posted October 23, 2020 On 10/19/2020 at 10:42 AM, Noobini said: look here: https://www.sidefx.com/tutorials/advanced-vellum-workflows-h17-masterclass/ last chapter is where inflation is shown. Go get the pbd_inflatable_toy file and study it. here's a quick adaptation. vellum_problem_fix.hipnc Hello, Thank you, but... your file does not solve the issue, if I increase the Rest Length higher than 1 (which is what you enabled) it turns unstable. The restscale attribute you tried to change through VEX does no effect because you ticked the wrong parameter. I will take a look at the masterclass. Quote Link to comment Share on other sites More sharing options...
Vinz Posted October 27, 2020 Share Posted October 27, 2020 Just in case, there is a recent post just up there that is a quite related. he (Jackassole) is dealing with restlength Worth checking. SOP level Vellum may be right for your application Quote Link to comment Share on other sites More sharing options...
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