Create an image of a vision board brimming with various steampunk elements. Picture the board adorned with aesthetic elements like ornate cogs and gears, brass goggles, leather corsets, rugged top hats, intricate mechanical timepieces, and vintage airships. Also incorporate sketches of cityscapes where Victorian architecture merges seamlessly with futuristic technology, creating a stunning mixture of old and new. Envisage images of people donning mechanised prosthetics and gear-laden clothing, embodying the quintessential steampunk style. The colour palette should be dominated by sepia tones, tinged with warm shades of copper and brass, maintaining the distinctive rustic feel of steampunk.