Blender is free as well.
I wrote this on Discord last week to a user asking the same thing about 3D knobs.
“For knobs, you can make the knob in 3D, texture it in Blender, then render with ortho camera and an animation for like 25-30 frames(eg rotating 7oclock to 5oclock), export as single png images or whatever, then you can create a texture atlas for those animation frames and load into JUCE with a FilmStrip like component that uses the value to change frames(which changes the rectangles location where you are sampling the knob from on the atlas)”
See;
Updated link from the other thread;