Do you always start a complex 3D part as a solid?

[indiancad]

For simple mechanical parts, starting with a 3D solid is usually straightforward.

But for parts with complex curved geometry, I sometimes find it cleaner to build the shape as surfaces first and then convert/thicken the result into a solid.

The advantage is that the surface geometry can be controlled independently before committing to the final solid form.

I’m curious how others approach this:

For complex curved parts, do you prefer a solid-first or surface-first workflow—and why?

[SLW210]

I normally start with a 2D shape, extrude, sweep, presspull. revolve, et al.

[ReMark]

23 hours ago, SLW210 said:

I normally start with a 2D shape, extrude, sweep, presspull. revolve, et al.

I followed this method as well.  I avoid using surfaces whenever possible due to problems (sometimes) with converting them to solids.

[indiancad]

16 hours ago, ReMark said:

I followed this method as well.  I avoid using surfaces whenever possible due to problems (sometimes) with converting them to solids.

I also prefer starting with 2D profiles and standard solid tools whenever they can achieve the required shape. Surfaces are useful for complex geometry, but gaps and trimming issues can make solid conversion difficult. I think the best approach depends on the shape and the level of control needed.