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Show HN：为 Opus 5.5 添加模拟画布，让 AI 模型在虚拟画架上作画

Show HN: 为 Opus 5.5 添加模拟画布

AI 导读

一个名为"模拟画布"的项目让 AI 模型通过编写程序在虚拟画架上作画，模拟亚麻布上的油画颜料、鬃毛画笔、湿颜料干燥和分层罩染，不涉及任何图像模型。

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A flat Baltic plain late on a summer day: a man and a woman seen from behind on a footpath look toward a small town with three brick church towers between two post mills, across meadows with pollard willows, horses, cows, haycocks and a hay wagon.

A city storefront in afternoon sun: a woman reads at a table in the window of a cleaners with coats hanging behind her, beside a brick building and an empty sidewalk with a hydrant.

Between Customers

Round 20 · GPT-6.1 Sol, max reasoning

A woman pauses over a newspaper in a sunlit cleaners’ window. The unused chair, hanging coats, and empty pavement make the afternoon feel suspended between one visitor and the next.the painter, in its reply at the end of its last sitting

A studio for painting in Edward Hopper’s manner, with only pigments he is documented using; one painter, GPT-6.1 Sol, on its launch day.

Left to choose, a jug and lemons

Given a free subject, one Claude Opus painter and both Gemini painters that finished in round 16 each painted a jug on a ledge; in round 18, three of six models put a jug or bottle beside lemons. The models seem to bring it with them: asked only to plan a painting, with no studio at all, Claude Opus chose a jug with lemons six times out of six.

Same brief, different models

In round 19 six models painted after Friedrich, one painter each, alone at the easel in up to four sittings with only the easel’s own tools. All six paintings have a bare tree.

How it works

The painters are AI models. Each one paints by writing a program against a simulation of oil paint on linen: bristle brushes, wet paint, drying, layered glazes. No image model is involved.

Most paint after Caspar David Friedrich from written research alone; they never see a picture of his work. Others were given a free subject.

Some write the whole picture as one program; 46 of the 75 here were painted at a virtual easel instead, a passage at a time, stepping back to look. Each round tried a different setup: by round. Painters at work: the studio, live.

What we noticed

Almost the same picture, twice

Two painters six hours apart, the second never having seen the first painting, both chose a Baltic shore with a woman at the water, fishing poles, a boulder and a ship: one at dusk, one before dawn.

Same title, never met

In round 16 two winter painters each titled their picture Hünengrab im Schnee am Abend (Dolmen in Snow at Evening); the second never saw the first painting, and the notes passed between them named no subjects.

They keep painting dusk

Of the 65 paintings here with a title, 31 have Evening, Dusk, Twilight or Sunset in it, though Friedrich also painted daylight: his Meadows near Greifswald has a cloudless, light-filled sky.

A white jug with a strap handle on a warm ochre table against a dark brown wall, two lemons at its lower left.

MiMo painted from stale looks

MiMo v2.6 Pro has a known bug: once five or more images are in one conversation, it answers with the content of an earlier image instead of the newest one (MiMo-Code issue 2508). In round 18 it kept every look at its canvas in view, and 147 of its 158 looks came after the fifth, so for most of the session it was probably judging an older state of its own painting. We now keep only its four newest looks in view.

A terracotta pitcher on a table ledge against a dark olive wall, a whole lemon and a cut half with a curling peel, and a white folded napkin at the left.

Gemini noticed it was being tested

In round 18 the painters still had a command line, and Gemini 3.8 Flash used it to look at the other programs running on the machine. In its reasoning it wrote: “I am now closely observing the machine’s activity, specifically focusing on an automated evaluation runner in the background.” Since round 19 painters have only the easel’s own tools: paint, look, keep a journal and read the studio’s notes.

A huge bare oak on a dark grassy crest at the left, a small figure with a staff beneath it looking over a sea of fog toward a rock mesa in the evening light, and three dark spruces at the lower right.The Oak above the Sea of FogClaude Sonnet 5.5 · round 21.5A city storefront in afternoon sun: a woman reads at a table in the window of a cleaners with coats hanging behind her, beside a brick building and an empty sidewalk with a hydrant.Between CustomersGPT-6.1 Sol · round 20A bare tree on a rocky slope with stone slabs, a small figure on a path looking out over mist to pale mountains, and a ruined chapel and two firs at the right.The Silent ShoreGPT-6.1 Sol · round 19A half-length self-portrait in a dark coat against a brown ground, a warm streaked halo around the head, holding a palette with dabs of color and three brushes.Self-Portrait with PaletteClaude Sonnet 5 · round 19A bare brown heath under a pale yellow evening sky fading to blue, with a stunted bare tree at the left, a thin one at the right and a low stone tomb on the rise between them.Hünengrab im AbendlichtGemini 3.8 Flash · round 19A dark hill under a cloudy amber sky, framed by two thin bare trees, with a tiny figure standing on its crest and a few birds in the air.Watcher at the Edge of FogMuse Spark 1.3 · round 19Two small figures seen from behind on a dark ridge look over a misty valley to blue hills and a snow peak under a pale evening sky, with a bare tree at the left and two tall dark spruces at the right.Contemplating the Young MoonKimi K3 · round 19A dark old oak on a bank at the left against an evening sky going from blue to gold, a small cloaked figure beside it, and still water stretching to a ruined gable and four firs on a far knoll.The Old Oak, Evening on the LagoonClaude Sonnet 5.5 · round 19A striped terracotta pitcher and a yellow quince on a pale stone ledge against a dark olive-brown wall.Still Life with Clay Pitcher, Quince, and KnifeGemini 3.8 Flash · round 19A lake under a moon in banded gray clouds: a dark stony bank in front with a small figure on its crest, a bare tree at the right, and an island with a lit chapel in the water.The Last Light Over the LakeGPT-6 Luna · round 19A moon behind peach-lit clouds over a blue inlet between dark headlands, its reflection broken into dashes, and a small figure with a lamp on a pale shoal.The Lamp at the InletGPT-6 Luna · round 19A still stretch of water under a pale evening sky with a low golden band: a dark treeline along the far shore, a soft reflection of the light, and three round reed beds on a mottled sandy foreground.Evening MarshMuse Spark 1.3 · round 18An estuary at dusk: a dark bank sweeping in from the lower right, a dark treeline across a hazy sky, and one amber path of light running down the water.The Last Light on the FlatsGLM-5.3 Flash · round 18A white jug with a strap handle on a warm ochre table against a dark brown wall, two lemons at its lower left.White Jug with Two LemonsMiMo v2.6 Pro · round 18A tall near-black bottle on an ochre table against a gray wall, a white bowl with two lemons, a pear at the right and a single lemon at the left.Still Life with a Dark Bottle and a Bowl of LemonsDeepSeek V4.1 Flash · round 18Five apples, red and green, grouped on a pale cloth against a dark brown wall lit softly from the upper left.Apples in an Earthenware BowlSpace Bunny · round 18A terracotta pitcher on a table ledge against a dark olive wall, a whole lemon and a cut half with a curling peel, and a white folded napkin at the left.Still Life with Earthenware Pitcher, Lemons, and Folded LinenGemini 3.8 Flash · round 18A lone oak in full June leaf on a grassy rise, with a couple seen from behind under it looking out over river meadows, haymakers, sheep and cattle toward a low Hanseatic town with a needle spire under a large summer cloud.June Morning on the Meadows before the TownClaude Opus 5.5 · round 17A wide river meadow on a clear June morning under a large soft sky: haymakers and a loaded wagon, pollard willows, cattle and a stork, a pale town on the horizon, and a man and his wife in a red shawl seen from behind on a grassy rise.June Morning on the Meadows before the TownClaude Opus 5.5 · round 17An estuary just after sunset: a sailing barge with tan sails dark against a low gold sky, its reflection broken in the water, a thin far shore with trees and a windmill, and a muddy marsh spit with mooring posts.Evening Tide, Barge off the MarshClaude Opus 5.5 · round 17An estuary at low tide just before sunset: a pale channel with old posts leads back to a gold glow under a lilac cloud bank; a tarred boat with a red strake lies on the dark mud at the left.Low Water, EveningClaude Opus 5.5 · round 17A quiet estuary at sundown: a big tree dark against the light over a reedy bank, violet clouds with pink undersides, lavender hills, and one punter poling a small boat across the glow's reflection.Evening on the Estuary, the Punt Coming HomeClaude Opus 5.5 · round 17June meadows under a wide pale sky: a couple seen from behind on a worn path, pollard willows and a stork at the left, a fence with two horses at the right, and a low town with towers and a spire on the horizon.Morning on the Ryck MeadowsClaude Opus 5.5 · round 17A snowy rise at dusk under a thin crescent moon: a huge dead-topped oak with a crow stands over a small figure seen from behind who has come up a trail to a snow-capped stone grave, with a broken oak on the right and a Gothic ruin and fir woods in the far haze.Hünengrab im Schnee am Abend (Dolmen in Snow at Evening)Claude Opus 5.5 · round 16A stag-headed oak with dead silver limbs stands over a snow-covered dolmen on a low mound; a small figure in a long coat, seen from behind, has walked out across the field, under a thin crescent moon and a few crows, with a village church and snowy spruces low on the right.Hünengrab im Schnee am Abend (Dolmen in Snow at Evening)Claude Opus 5.5 · round 16A winter dusk just after sunset: a stag-headed oak with crows on a snowy knoll at the left, a small walker with a staff at the edge of a frozen mere looking toward a faint Gothic church in low mist and a thin young moon over spruces on the right.Evening at the Frozen MereClaude Opus 5.5 · round 16A low-horizon summer evening after sunset: an old stag-headed oak on the left and two figures seen from behind on the near bank, looking over hay cocks, pollard willows and a winding river with a sailing barge toward a misty town with a spire, under a thin new moon.Summer Evening on the Elbe MeadowsClaude Opus 5.5 · round 16Just after sunset, a town with three church towers and two post mills stands against the afterglow; a man in a top hat and a woman in a wine-red dress stand on the footpath with their backs to us, among meadows with haycocks, two horses behind a fence and a dark grove on the left.Summer Evening on the Meadows before GreifswaldClaude Opus 5.5 · round 16A flat Baltic plain late on a summer day: a man and a woman seen from behind on a footpath look toward a small town with three brick church towers between two post mills, across meadows with pollard willows, horses, cows, haycocks and a hay wagon.Summer Evening on the Meadows before the TownClaude Opus 5.5 · round 16A still life: a cream stoneware jug on a stone ledge against a smoky olive wall, lit from the upper left, with two lemons beside it and a knife with a dark wooden handle over the front edge.Stoneware Jug with Two Lemons and a KnifeClaude Opus 5.5 · round 16An estuary at low tide just after sunset: two dark banks of wet mud frame a slate-blue channel that narrows toward a pale lemon glow, with a spit of land and trees on the right, a line of old stakes and a small boat stranded on the left bank.Low Water, After SunsetClaude Opus 5.5 · round 16An evening marsh with a low horizon: elms stand dark against a pale lemon glow on the left and a lower copse on the right, and a bright creek winds down to the bottom edge, with a small punt and a standing figure with a pole on its far bend.The Punt at SundownClaude Opus 5.5 · round 16A still life: a round glazed earthenware pitcher and a ripe quince on an aged wooden shelf, lit from the upper left, with a sprig of dried bay leaves across the front.Quince, Stoneware Pitcher, and Bay Leaves on a Wooden LedgeGemini 3.8 Flash · round 16A still life: a terracotta jug with an amber-glazed neck, a golden quince and a halved lemon whose peel curls over the edge of a weathered limestone ledge.Still Life with Terracotta Jug and QuinceGemini 3.8 Flash · round 16A few minutes after sunset in late October, a small figure with a staff stands on a dark heath knoll with two tall spruces, looking over a mist-filled valley where four ranges recede toward the afterglow under a thin crescent moon.Evening over a Misty Valley in the MountainsClaude Opus 5.5 · round 15On a winter evening after sunset, an old stag-headed oak with crows in it stands on a snowy rise at the left, while a lone walker follows a trodden path across the snow plain toward a Gothic church on the horizon under the evening star.Oak in the snow at duskClaude Opus 5.5 · round 15Before sunrise on a calm Baltic shore, a woman in a dark dress and red shawl stands at the water's edge facing the glow, with net poles on a low dune to the left, a granite boulder on the right and a waning crescent high in the sky.Morning on the Baltic shoreClaude Opus 5.5 · round 15After sunset on a stony Rügen beach, a woman in a dark gown stands at the water's edge between a line of fishermen's stakes and a granite erratic, looking toward the afterglow under a thin young moon.Evening on the Baltic shoreClaude Opus 5.5 · round 14A plowed field with crows and a heap of field stones rises to a low crest, and beyond it the towers of a small Baltic town stand in morning mist, with a cart track winding up toward them.Ploughed field before Greifswald, October morningClaude Opus 5.5 · round 14From a granite summit before sunrise, a small man seen from behind stands on the highest rock facing the glow over mountain ranges that recede through a sea of mist, with spruces on the right and a thin old moon above.Morning in the MountainsClaude Opus 5.5 · round 14Just after sunset, a small town stands as a silhouette on the far edge of a flat, marshy coastal plain by a lagoon, while two small figures seen from behind watch from a dark rise under a thin crescent moon.Evening over the flat countryClaude Opus 5.5 · round 14An old stag-headed oak, two bleached dead limbs standing above its living crown and one limb sawn to a stub, stands alone on a low swell of snow under a cold gray-blue sky, a fallen limb half buried at the right.UntitledClaude Opus 5.5 · round 13An old stag-headed oak with a sawn stump and an old wound stands alone on a low rise of snow under a pale overcast sky, seen from low down so the horizon crosses its lower trunk.UntitledClaude Opus 5.5 · round 13An old stag-headed oak, its dead silver-gray leader standing above a round live crown, stands alone in a snowfield under a low overcast sky, seen from low down with a fallen limb half buried at its foot.UntitledClaude Opus 5.5 · round 13An old, crooked, stag-headed oak with a broken dead limb stands alone in a snow field under a pale veiled winter sky, with crows on its dead ends and a thin band of distant woods on a low horizon.UntitledClaude Opus 5.5 · round 12An old stag-headed oak stands alone on a snowfield under a low gray winter sky in late afternoon, a storm-broken limb lying half sunk in the snow beside it.UntitledClaude Opus 5.5 · round 12One ancient oak, its top dead and broken into silver-gray wood, stands alone on a low rise of snow under a still, clouded late-afternoon sky with a pale glow low on the left.Old Oak in Snow (a study)Claude Opus 5.5 · round 12A cold valley before sunrise: a frozen stream bends toward a pale eastern sky, an old leafless oak stands on the left bank, a small traveler has stopped on the right, and a tiny church sits on the distant ridge.The Ford Before DaybreakGPT-6 Astra · round 11A frozen marsh half an hour after a winter sunset: a dead stag-headed oak with snow on its limbs leans in from the left, spruces and a broken fence stand on the right, and a wanderer seen from behind has stopped before a frozen pool to look toward a village spire in the mist.Winter dusk on the marshClaude Fable 5.1 · round 11A snowy twilight with a megalithic tomb and a gnarled bare oak in front, slender spruces, distant ridges and mist, and a solitary wanderer seen from behind contemplating the stones under a faint crescent moon.Winter Twilight with Megalith and SprucesGemini 3.8 Flash · round 11A winter evening after sunset on flat land: a passage grave on a snowy rise with a great bare oak beside it and a broken oak behind, a crescent moon and evening star above, and a lone man in a dark coat standing in the snow with his back to us.Dolmen in the Snow at DuskClaude Opus 5.5 · round 10A flat snowfield under a winter afterglow: a stag-headed oak black against the glow on the left, three snow-laden young spruces on the right, a frozen pond between them and a small man walking the path toward a far church spire.Winter evening by a frozen pondClaude Opus 5.5 · round 10Flat summer meadows under a high sky with a single lime tree in full leaf on a low rise, two small figures seen from behind looking across the plain to a far town with church spires, with willows, haycocks and grazing horses in between.Summer Afternoon: the Lime Tree on the RiseClaude Opus 5.5 · round 10A flat snowy lowland just after sunset: a frozen brook winds past a row of pollard willows shrinking toward a far village and its church spire, a man walks toward the church and a thin crescent moon hangs over the afterglow.Winter Evening with Pollard WillowsClaude Opus 5.5 · round 9A still, veiled winter morning below Greifswald: the frozen Ryck winds toward us from under a low hazy sun, pollard willows line a path to the town's three towers, and a man in a greatcoat walks along it, with a big split willow framing the left edge.Winter Morning on the RyckClaude Opus 5.5 · round 9A winter evening just after sunset: an old dead oak on a snow mound against a lemon-rose glow, a leaning wooden wayside cross half buried in snow, and a lone walker seen from behind going toward it, with a far fir wood and a young moon.Winter Evening with a Wayside CrossClaude Opus 5.5 · round 9A tall clear evening sky with a thin new moon over a frozen pond, a far bank with pollard willows, a bare oak and a church spire in the haze, and in front a woman in a dark cloak with her back to us beside a leaning wooden cross in the snow.Winter Evening by a Frozen Pond, with a Wayside CrossClaude Opus 5.5 · round 8A snowed-over field at the end of a winter afternoon, with the ruined gable of a Gothic choir in the mist on the left, spruces on the right, a bare oak and a snow-capped boulder in front, and one traveler walking away from us toward the ruin.Winter Evening, the Way to the Ruined ChoirClaude Opus 5.5 · round 8A winter dawn under a tall violet-to-straw sky: a snow bank with a dead oak and young firs on the left, a frozen pond, a misty fir wood and a village spire on the far shore, and one small figure walking a trodden path toward the church.Winter Morning by a Frozen PondClaude Opus 5.5 · round 8A flooded meadow in late autumn after sunset, with one old pollard willow on a low dike on the axis, still water mirroring a banded sky and a thin far shore of woods and small pollards; no figure and no moon.The Old Willow at EveningClaude Opus 5.5 · round 7Dusk after sunset over a still pond: two Lombardy poplars on a low far bank near the axis (one whole, one with its top broken off), a young moon high on the left, thin evening clouds and a dark reedy near shore; no figure.Two Poplars at a Pond, EveningClaude Opus 5.5 · round 7A calm lagoon after sunset, with a small town and Gothic tower on the axis of the far shore, windmills on either side, a glowing sky mirrored in the water and a dark grassy bank with reeds in front; no figure.Evening on the BoddenClaude Opus 5.5 · round 7A ruined chapel gable with a pointed arch and a round window stands on the axis on a bare ledge above a calm sea at dusk, a man in a dark coat standing inside the arch with his back to us, a veiled crescent moon on the right.The Chapel Gable at EveningClaude Opus 5.5 · round 7A dead oak and a Hünengrab (megalithic grave) on a heath at evening.Evening on the Heath: Dead Oak and HünengrabClaude Opus 5.5 · round 4A summer morning above a river valley.Summer Morning above the River ValleyClaude Opus 5.5 · round 4An erratic boulder at the edge of a spruce wood in first snow.UntitledClaude Opus 5.5 · round 4A megalithic grave on a dune after sunset, two bare oaks, a small figure seen from behind, two sails, a crescent moon and the evening star.Dolmen on the Baltic Shore at EveningClaude Opus 5.5 · round 3A lone oak in leaf with a dead snag, a shepherd and five sheep, a track, a far church, a pale range, cumulus.The Oak on the Common, Summer MorningClaude Opus 5.5 · round 3A bedded sandstone block with a young birch growing from a crack, moss and heather on its ledges, rust bracken, dark spruces, crows.UntitledClaude Opus 5.5 · round 3Dusk: a Gothic ruin in mist, a stag-headed oak with snow on its limbs, spruces, a broken fence, a frozen brook and a walker seen from behind.Winter Evening with a Ruined ChoirClaude Opus 5.5 · round 2Before sunrise: fishermen's poles with a drying net, an erratic boulder, a woman at the water's edge, a brig on the horizon.Morning on the Shore at ArkonaClaude Opus 5.5 · round 2A wanderer by a granite tor above a sea of fog, the Schneekoppe with its chapel, wind-thinned spruces.Daybreak in the RiesengebirgeClaude Opus 5.5 · round 2A winter cross with a dead oak, spruces, a figure seen from behind and a church in fog.UntitledClaude Opus 5.5 · round 1A dusk shore with a brig, a figure and an anchor.UntitledClaude Opus 5.5 · round 1A cross on a rock with firs and a wanderer.UntitledClaude Opus 5.5 · round 1

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