Jin Lee’s “Exploit” (2016), concrete, steel, wood, cast iron, brass and copper, at Hillyer Art Space. (Jin Lee/Hillyer Art Space)

To prove that he should be king of Britain, Arthur pulled a sword from a stone. That feat is evoked, visually, at least, by Jin Lee’s “Exploit.” The local sculptor’s Hillyer Art Space show consists of blocks of concrete, partly shattered by wooden and metal wedges. The point of these exercises is not to summon anything from the man-made rock, but simply to smash the implements into it. The results are brawny metaphors for change.

Lee varies the format by tinting the concrete in assorted colors, including black, green and brick red. Inherent in her method is another variation: The blocks shatter in multiple ways, yielding different sorts of shards to be arranged into tableaux of destruction.

Sculptors have long shaped hard and heavy materials, of course, but traditionally the goal was to give shape and even delicacy. Lee’s pieces exemplify modernist art’s emphasis on ideas and process over form and outcome. The heavy tools and ruptured blocks are substantial, but they merely illustrate Lee’s call for transformation.

Equally violent, and potentially more disturbing, is “Consumables,” also at Hillyer. What’s being consumed in Rachel Schechtman’s mixed-media assemblages is the human body, eaten by disease and hewed by surgery. To conjure fleshly weakness, the D.C. artist combines medical gear with incongruous materials, such as used motor oil, and chicken skin and fat. Some pieces are more evocative than others, but most gallerygoers are likely to experience a sense of their own vulnerability.

Jin Lee: Exploit and Rachel Schechtman: Consumables On view through Aug. 28 at Hillyer Art Space, 9 Hillyer Ct. NW. ­202-338-0325. hillyerartspace.org.

Rainbow fiber bridges have been erected at Hemphill Fine Art’s storefront location at 1700 L St. NW. (Hemphill Fine Arts/Hemphill Fine Arts)
TOKI Synth Series

In Norse myth and Marvel Comics, a rainbow bridge links Asgard and Earth. Rainbow fiber bridges have been erected at Hemphill Fine Art’s storefront location at 1700 L St. NW, but they divide rather than connect. Radiating from a center point, the oblique spans of “TOKI Synth Series 005: Reverb” carve the raw space into rooms of a sort. The strings are thin, closely grouped and brightly colored, so their glimmering appearance changes as the light does. Visitors can prowl through the passageways or sit on cushions and savor the synth-soul soundtrack.

TOKI is a collective nickname for Toluwalase Rufai and Khai Grubbs, who devised the installation. They’re fledgling architects but also music lovers who invite their guests to write the name of their favorite album on a blank wall. (Some couldn’t stop at one.) The songs TOKI chose to play influenced the piece, Rufai noted, and asking for others’ musical faves expands the collective experience. It’s just one of the ways, he said, “people become part of the artwork.”

(The installation can be viewed from outside anytime; visitors can enter only on Saturdays from noon to 5 p.m.)

TOKI Synth Series 005: Reverb On view through Sept. 3 at Hemphill at 1700 L St. NW. 202-234-5601. hemphillfinearts.com.

Wade Kramm’s “Dotted Space” at Target Gallery. (Kaitlyn Ward/Courtesy Wade Kramm)
Wade Kramm

At Target Gallery, Wade Kramm also is defining space with lines, but broken ones. “Dotted Space” uses them to enclose both flat and three-dimensional areas. Contiguous black dashes on the walls and floor in one corner mark off a small chunk of the gallery as a separate place. Nearby, 3-D angles protrude from various sections of wall, as though a room from another dimension partly intersects this one.

Kramm is as interested in demonstrating the various forms that dotted lines can take as he is in using them to divide an open area. The show includes a few small pieces on folded paper, as well as a rectangle of neon tubing that’s taped over at regular intervals to simulate dashes floating in space. In the dark, the piece might conjure that illusion, but Kramm’s goal is not to fool the senses. He uses the visual language of blueprints and diagrams to turn actual spaces into theoretical ones, a process that calls on the mind more than the eye.

Wade Kramm: Dotted Space On view through Aug. 28 at Target Gallery, 105 N. Union St., Alexandria. 703-838-4565, Ext. 4. torpedofactory.org/partners/target-gallery.

1460 Wall Mountables

Every summer, the District of Columbia Arts Center uses string to divide its walls into 2-by-2-foot squares, each rentable to artists or would-be artists for $15. The string isn’t part of the show; it comes down once entrants have staked their claims. The selection this year is fairly typical, with lots of stuff that’s more pulp fiction than fine art.

Many contributors are represented by a single piece, but three have taken enough space to stage mini-surveys of their works. Paul Bennek is showing absurdist collages derived from the sort of 1950s-vintage comics once repurposed by Roy Lichenstein; the most effective depict square-jawed men whose reality has been just slightly skewed.

Gregory Ferrand uses a sort of graphic-novel style, but painted in acrylic. Three of his four pictures are gray-blue portraits of impassive subjects; their emotionless faces contrast full-color vignettes, representing memories or musings, that seem to burst from their hearts.

Aside from their square format, Nihal Kececi’s landscapes are unusual in this context. Her work is impressionistic and luminous, in the manner of J.M.W. Turner, with filtered sunlight expertly rendered in the skies. In a show full of outlined figures, Kececi’s soft colors and mutable forms stand out.

1460 Wall Mountables On view through Aug. 28 at District of Columbia Arts Center, 2438 18th St. NW. 202-462-7833. dcartscenter.org.

Adolf Sehring’s “Apple Harvest” at Marin-Price Galleries. (Adolf Sehring/Marin-Price Galleries)

Landscapes and cityscapes are the most common genres in “The Realism Exhibit,” a rotating selection of paintings at Marin-Price Galleries by about a dozen contemporary artists. The styles are as traditional as the subjects, and the work is notable more for exceptional skill than for any distinctive vision. But the show does perform one intriguing flip: The rural scenes are often more ominous than the urban ones.

That might simply be a matter of palette, as with Adolf Sehring’s “Autumn Appalachia,” which renders a farm in dark fall colors. Twilight or a gathering storm gives a hint of menace to Joseph Sheppard’s dramatic “Corn Field,” in which red light slips through black clouds. Much sunnier are Arthur Day’s slightly flattened New York vignettes, notably one of an unpopulated Penn Station. Jenness Cortez’s charming “Materiel de Cuisine” depicts a simpler subject — a French cookery shop with a bright green front. Yet its intricate play of light and shadow makes the picture as complex as any in this array of deft and detailed canvases.

The Realism Exhibit On view through Aug. 31 at Marin-Price Galleries, 7022 Wisconsin Ave., Bethesda. 301-718-0622.marin-price.com.