Jumping out of the hard surface modelling, I tripped over a tutorial for modelling a car tire.
It’s by CGMasters – https://www.youtube.com/watch?v=PcIu2hIO4Og
This again, took me a long time to go through. And once finished, or near finished I had a lot of little geometry clean up that I had to do on the tire. That shouldn’t have happened as I understand it, so I likely need to repeat this a couple of times to figure out what I am doing wrong.
The finished product looks pretty good though, I am happy with it. I only modelled the rubber, not the rim, that was provided as part of the tutorial.
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