I was using Fusion360 to create a spatial structure with generative design to support internal parts of the device.
The idea was to pack everything as neat as possible and looked like this:

All the parts (but casing) were supposed to be 3d printed, in Fusion360 all together:

I had to model red 'no-go" zones, green "fixed to stay" zones and blue "forces" to shape the body.

(Starting yellow body not shown, boundary all-around red “no-go” zone not shown. Second load combination not shown (from tubes down). Almost max resolution.)

Iteration 20

Iteration 30

Iteration 40

Iteration 50

Iteration 60

Iteration of choice 46When the initial boundary conditions and forces are not set well you could get something ugly as this one:

Combined renders

Steel print is too expensive so I ordered black Nylon PA12, hoping to paint it later. Paid $135 per two units

Then I tried to paint it with orange fluorescent paint but failed to get as smooth nice surface as in the render. Also fluorescent wasn't too strong even after countless layers.

The finished project of this tube bass amp with DSP module and class D poweramp is to be published later.