New challenges are coming from smaller firms, such as Think3, that compete for midsize customers.

FORBES: International

Louis, which makes cladding for buildings such as the Staples Center in Los Angeles, hooked up with Think3 two years ago.

FORBES: Easy Designer

Think3's free training classes and comprehensive in-person help trumped any brand-cachet issues.

FORBES: Easy Designer

The descriptor capabilities come from a European design project called Fiores II that Think3 participates in along with companies such as BMW and Pininfarina, a Ferrari design firm.

FORBES: Easy Designer

But modifications are far easier in programs such as Think3's.

FORBES: Easy Designer