Clone Armor Concept Art

Asajj Ventress Concept Art (originally Sith Villain from Star Wars: Episode II: Attack of the Clones)

Ralph McQuarrie Concept Art for Star Wars

v-150 Planet Defenders were large ion cannon emplacements designed for defense against starship assault. The cannons were powerful enough to shut down large vessels, but as they were completely immobile, they were vulnerable to ground assault.

Source: The Illustrated Star Wars Universe (1995)

First Appearance: Episode V - The Empire Strikes Back (1980)

Star Wars Concept Art | the Jedi bow before the queen by Paul Topolos

The amazing concept art of Star Wars Jedi: Fallen Order by Gabriel Yeganyan,  Jordan Lamarre-Wan,  Jean-francois Rey and Bruno Werneck

Artbook: Art Of Star Wars Jedi: Fallen Order

ILM artist John Dykstra with a Darth Vader costume concept circa 1975, plus some design sketches by Ralph McQuarrie.

Concept art for Yoda, from the upcoming Star Wars: High Republic.

Ralph McQuarrie concept art for Return of the Jedi (1983)

The amazing concept art of Star Wars Jedi: Fallen Order by Gabriel Yeganyan,  Jordan Lamarre-Wan,  Jean-francois Rey and Bruno Werneck

Artbook: Art Of Star Wars Jedi: Fallen Order

Star Wars: Revenge of the Sith Concept Art | by Aaron McBride