3D modelling

been wrestling with a rhino the past week or so. in theory i’m not asking it to do anything difficult, but in practice i just don’t speak rhino 😀

i wanted to make use of the benefits of digital design to make a medal for the bams student medal competition. i figured it would be a good way to split a shape with interesting geometry, and to produce two perfectly fitting halves of a whole.

initially i had no plans to use digital print in the final piece, i thought i’d just use it to produce a blank for mould-making, but when i saw the results from the powder bed printer i really liked the look and feel of them. it would also save all the additional work of mould making for traditional casting. i hoped by digitally printing i’d be able to include more detail than i could have achieved using casting methods, which still baffle me.

my tasks were splitting a solid, engraving text around the edge and inside, placing an accurate centre hole and applying an image to the top surface. mostly achieved in the end by flow along curve and surface and boolean split/difference to make cuts/holes in the solid.

the image on top is taken from a photograph (via photoshop) and used to create a heighfield surface – lighter areas produce high relief, darker parts are set back. i’m stuck at this point with how to join the height field surface to the solid medal, or even if i need to do that – if it renders okay it might print okay? only one way to find out… test printing… hours of test printing…

image on top is of a silk moth, bombyx mori. text is from kafka’s metamorphosis “he is my unfortunate son! can’t you understand i have to see him?”. the plan is  to cast the plainer bottom half of the medal in clear resin, including spun/woven reeled silk threads and a silk worm from inside a cocoon.

the halves will be held together using 4mm neodymium magnets in the central holes. it was brilliant trying the magnets in my first test print, they really brought it to life, gave it the pull of an  invisible thread that i was hoping for.

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