hey Jeff than you so much , well I used contour command with small distance between , then I rebuild the curves - then I add some points to the last curves and manually put them close together to form that thumb , the best way I think is to use _interpCrvonsrf like you told me but for now I will leave it as it is ,thx again for your time and effort to help me .
Best regards Alex
Here is what i've done so far
bdw do you know a good way to offset a mesh , when I use the offset command in Rhino it offsets from the middle of the structure from inside out,in other words is not useful.I want for this cast to be a double layer - scale will not work ..
(grasshoper or rhino will be fine )
any tips ?/ty