Mars colony dome painting by Blackbird Interactive

Picture of the Day 24/1/2019 - painting of Mars colony dome by Canadian game developer Blackbird Interactive (Brennan Massicotte) for its "Project Eagle" - a 3D interactive Mars base free to play on Steam and developed in collaboration with NASA’s Jet Propulsion Laboratory. The interactive base is intended as NASA's vision of what a human base on Mars would look like in 100 years.
Here are HD images from the project.

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SpaceX stainless steel Starship docked to ISS by Reese Wilson

Picture of the Day 22/1/2019 - SpaceX's stainless steel Starship docked to International Space Station (ISS) by Reese Wilson. More of his SpaceX photos and renders on his Flickr page.

SpaceX spaceport on Mars by Mike Winkelmann (beeple)

Picture of the Day 20/1/2019 - vision of a futuristic SpaceX spaceport on Mars by digital fantasy artist Mike Winkelmann, better known as beeple. More of his art here.

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Farming in a dome on Mars by Mike Kiev

Picture of the Day 19/1/2019 - farming in a dome on Mars by Ukrainian photographer & illustrator Mike Kiev. More of his works here.

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Closeup of the colony town in the background:

SpaceX stainless steel Starship fleet orbiting Earth by Reese Wilson

Picture of the Day 17/1/2019 - SpaceX's stainless steel Starship fleet orbiting Earth by Reese Wilson. More of his SpaceX photos and renders on his Flickr page.

SpaceX stainless steel Starships at Mars Base Alpha by William Falconer-Beach

Picture of the Day 16/1/2019 - SpaceX's stainless steel Starships at Mars Base Alpha; fan-art by William Falconer-Beach. More of his Starship renders here.

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Mars house interior and exterior

British The Sun has published an article what the human residences on Mars could look like by 2050 with architects and scientists prototyping several possible types of homes for would-be Martian colonists. All the designs are meant "to protect interplanetary homeowners from hazardous cosmic rays, space radiation and Mars' severe dust storms, as well as insulate them from the cold."

Here are interior and exterior images for the 3rd design - individual house.
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Other designs:

• Mansions in a crater community
• Apartment block covered with Martian regolith

SpaceX Starship + Super Heavy compared to Saturn V & Falcon 9 by Kimi Talvitie

Comparison of 1) the full stack Starship & Super Heavy, 2) the most powerful rocket ever built (till Starship & Super Heavy will be built) - Saturn V - and 3) today's workhorse of SpaceX - Falcon 9; made by Finnish 3D artist Kimi Talvitie. Comparison of Starhopper, Starship, Super Heavy, Falcon 9 and Starship + Super Heavy here.

SpaceX Starhopper launch by Owen Egan

Concept images of SpaceX's stainless steel Starship test vehicle (Starhopper) by British graphic designer Owen Egan (known on NASASpaceFlight.com forum as "tea monster"). The Starhopper is not shy of its wrinkles :) More of Owen's art here.

The SpaceX's Starship test vehicle (being a bit shorter, ~40 meters, than the full-scale Starship) is built in Boca Chica, Texas and scheduled to fly first test flights on March/April 2019.

Retro style Mars rover by David A. Hardy

Picture of the Day 11/1/2019 - a small ATV type, retro style Mars rover in front of NASA's lander (1981) by classical space artist David A. Hardy. More of his Mars art here.