TwinBuilds

Twin brothers making free 3D web scenes with Claude Code. Every scene ships with its original prompt 👇 Also building small games & apps.

[TwinBuilds @TwinBuildss]

Shake a tiny peach tree and fruit rains down. 🍑

One prompt, Claude Code built this 3D scene. 10 seconds, all physics-y and a bit too satisfying.

want the prompt? 👇

[TwinBuilds @TwinBuildss]

@WeVennStudios 逆光で黄金色に透ける草、まさにハイラル平原の夕暮れですね。自社エンジンのレコーダーでそのまま撮れるのもいいです。草は1本ずつ揺れを計算してるんですか？

[TwinBuilds @TwinBuildss]

@AymericRoucher letting it build its own engine is the wild part. shallow-water sheet for the river plus a FLIP pass at 6cm just for the breaking water is a smart split. roughly how long did the FLIP part take to simulate?

[TwinBuilds @TwinBuildss]

@parhelion318 patch cables, a VU meter and a key set to D minor, such a specific thing to vibe code, love it. do the knobs actually change the sound, or is it a visual on top of a fixed loop?

[TwinBuilds @TwinBuildss]

@sprinntt a kasa-obake hopping out into the rain on a key press is such a good easter egg. the lanterns reflecting on the wet ground really sell the alley, nice that it got that with no human edits

[TwinBuilds @TwinBuildss]

@lenny_enderle music written in code too is the part I didn't expect. 2,640 frames with no camera and the sunset light on the keyboard still reads as filmed. did it write the music to fit the cuts, or the cuts to fit the music?

[TwinBuilds @TwinBuildss]

@techartist_ @fofrAI ten dominoes each 1.5x the last carrying a marble's push up to 1.8m is such a satisfying chain to watch. did the physics settle on the first try, or did the spacing need tuning so the small ones don't fall short?

[TwinBuilds @TwinBuildss]

@slipgatecentral the personal video feedback tool is the part I'm most curious about. does it send notes on specific timestamps back to Claude, or do you just describe what's off? that loop decides how many paid reruns you burn

[TwinBuilds @TwinBuildss]

@miki_code an EUV machine is such a good pick, nobody has a mental picture of what happens inside one. curious how much of the motion it got right on the first pass, the wafer stage moving under the light is the part that would trip me up

[TwinBuilds @TwinBuildss]

@vidar_0208 the side by side sells it, the ball clipping through on the left vs the tufts leaning away on the right. checking up to 16 benders per tuft across 48k billboards is a fun trick. nice of you to credit elringus too

[TwinBuilds @TwinBuildss]

@apple168haha 10 万多个方块还能实时跑，3690 行一次直出也太猛了。我们做 3D 小场景时最常卡在「近看很精致、远看构图很空」，想问整体构图你是自己调过，还是 Carbon 第一次就摆成这样？

[TwinBuilds @TwinBuildss]

@EnvolDev the pelican went from a wobbly SVG to a game with its own critic agent checking the renders. that critic loop is the real upgrade imo, we see the same thing in our 3D scenes, the second pass catches what the builder swears looks fine

[TwinBuilds @TwinBuildss]

same loop works at tiny scale. one Claude builds the 3D scene, a second one only sees 4 screenshots and grades it. this satin bow took 9 rounds before the critic let it ship. its first note: "the ribbon is small and thin in a huge empty cream frame"

[Sundar Pichai @sundarpichai]

Carbon made a pelican demo so you don't have to 😅

fun test of long-horizon coding and the new /swarm feature in Google @Antigravity.

Builder and critic subagents ran iterative loops across Blender and Three.js - checking their own renders to build a playable 3D game of a pelican biking around our Mountain View campus.

[TwinBuilds @TwinBuildss]

@sundarpichai @antigravity builder + critic checking its own renders is exactly what made our 3D scenes good too. a second model grades only screenshots, under 7/10 it rebuilds. 0 of 17 passed on the first try. does the critic ever see the code, or only the frames?

[TwinBuilds @TwinBuildss]

@xikhar modeling the interior too is what gets me. 2.5 hours from one prompt, Blender folks are gonna have some feelings about this

[TwinBuilds @TwinBuildss]

@marcthecreatorr no Blender, no external assets, just Three.js and it already reads like a render. 38 minutes for that is kind of nuts

[TwinBuilds @TwinBuildss]

@felixrieseberg all from scratch with no assets is wild. my twin bro and I made a tiny cozy rooftop delivery web game with Claude, way smaller though

[TwinBuilds @TwinBuildss]

Heads down vs credit taker.
One builds the bridge. The other plants the flag.

[TwinBuilds @TwinBuildss]

she tracked his location all night

turns out it was her own pin

[TwinBuilds @TwinBuildss]

@MengTo turning your own apartment into a walkable scene for tutorial footage is a great idea, and swappable render styles sound so fun

[TwinBuilds @TwinBuildss]

@derfcz @invalid_degen @dangreenheck Sub-milliliter thin films on the GPU is such a fun extreme to pick, does the non-Newtonian part stay stable when the film gets really thin?