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04 — Singularity: how an agent could make it
Original Blender Studio (dir. Andy Goralczyk, art director Vivien Lulkowski), 2026, open movie: painterly NPR in 4K HDR · Digital Production, 2026-05-15
Agent-readiness today Taste-bound. The machinery is highly agent-friendly: the released shot shows the look is almost entirely Geometry Nodes groups (1,799 GN modifiers in one shot) and it is all scriptable. The hard part is the watercolour judgement: stroke size, colour bleed and what to leave unpainted. That is human taste and cannot be verified numerically.
Difficulty 4 (a short film, but the look itself is a research project, and the production pushed Blender 5.x development)
First slice A painterly ice-shard belt around a black hole: shards scattered in a volume by GN, covered in brush strokes from the Blender Studio Brushstroke GN library shipped in the 4.2 Gold splash (assets/nodes/brush_stroke_generation.blend), with a glowing curve trail left by a small critter, rendered in Cycles next to the real Singularity shot (the 5.1 splash file).

1. What the original actually is

Section titled “1. What the original actually is”
  • Film: “a painterly space adventure set in a universe before the beginning of our time”, and Blender Studio’s first film in 4K HDR (Singularity premiere, verified).
  • Delivery: 4K HDR to ITU-R BT.2100, with an SDR version (Digital Production, verified).
  • Runtime and shot count: not published in the sources I fetched.
  • Released under CC-BY: character models and rigs, texture packs, compositing assets and production shots (premiere post).

Concrete evidence on this machine. The Blender 5.1 splash file ~/newblender-data/downloads/blender-5.1-splash.blend is a Singularity production shot. Its embedded paths point to /data/singularity/svn/pro/shots/020_ice0030-lighting.blend and Singularity asset maps. Census figures (~/newblender-data/census/downloads__blender-5.1-splash.blend.json):

Measure Value
Render engine Cycles
Objects 1,111 (855 mesh, 201 hair-curves objects, 14 curves, 13 armatures, 11 lattices, 8 lights)
Faces 5,425,533, of which 98.1% are triangles (5,322,538 tris, 102,963 quads, 32 ngons)
GN modifiers 1,799, against 69 Subdivision, 64 Armature and 56 Decimate
Node groups 95 geometry, 56 shader, 29 compositor
Top GN groups GN-LOD_asset 447, GN-edge_fade 447, .brushstroke_tools.pre_processing 115, GN-ice_belt-package_instance 111, .brushstroke_tools.surface_fill 77, .brushstroke_tools.surface_draw 30, GN-distance_to_silhouette 62, GN-ice_fungus_generic 38, GN-swarm_creature_wiggle 18, GN-scatter_ice_shards_in_volume 6, FX-swarm 1

Reading:

  • This is the opposite of the S01 census, where 94.5% of faces were quads. Singularity’s shots are generated, LOD’d, triangulated geometry dressed in procedural strokes.
  • The authored artefact is the node recipe, which is ledger L-006 in its purest form.

2. How the humans made it

Section titled “2. How the humans made it”

Facts:

  • Stages: S03, S04, S06, S07, S09, S10 (index §04).
  • The team expanded the Brushstroke Tools library with new painterly assets (Digital Production).
  • Brushstroke Tools was created for Project Gold, the Blender 4.2 splash (search result, studio.blender.org). The local Gold splash confirms it: gold-splash_screen.blend uses GN-surface_brush_strokes 19 times, and assets/nodes/brush_stroke_generation.blend ships surface and volume stroke groups.
  • Procedural crowd systems used Geometry Nodes, with node-based instancing and caching strategies (Digital Production).
  • The production ran on daily Blender 5.x builds, and its optimisation needs fed into changes in Blender 5.0 and later 5.2 LTS (search result, Studio blog “Blender development, Singularity and beyond”).

Interpretation:

  • The watercolour look comes from strokes as geometry: hair-curve objects (201 in one shot) generated on surfaces by GN, then shaded with brush-texture alpha.
  • It is not a post-process filter. Silhouette-distance and edge-fade groups control where paint thins out, which is how a painter leaves paper showing.

3. How I would make it: the agent-native plan

Section titled “3. How I would make it: the agent-native plan”
Stage Agent approach Inputs Tooling
S04 Geometry Nodes (environment) Ice belt: a torus-shaped volume, with points distributed in it by density falloff, and shard meshes instanced with random scale and rotation. This mirrors GN-scatter_ice_shards_in_volume and GN-ice_belt-package_instance. LOD by camera distance (GN-LOD_asset pattern). None (shards are procedural: a convex hull of random points) GN built by script
S03 Shading (painterly) Link the Studio’s Brushstroke GN groups and painterly shaders from the Gold splash and apply them as modifiers; the agent sets stroke length, width, density and the colour source. blender-4.2-splash/assets/nodes/brush_stroke_generation.blend, shading_painterly.blend (CC-BY) bpy.data.libraries.load; GN inputs by identifier
S04 FX Critter trail: a curve following an animated empty, resampled, with glow strength by age (the GN-creature_trail-animated_character_trail pattern). Black hole: an emissive accretion ring plus a lensing approximation (refraction sphere or compositor distortion). None GN, compositor
S06 Layout The camera orbits at a declared radius, focal length and roll; composition rules (thirds, critter screen size) are checked numerically. Storyboard frame (human) Camera as data
S07 Animation Swarm wiggle on background critters via GN noise over time. The hero critter’s acting is human. Human animation GN time inputs
S09 Lighting & rendering Cycles (as in the shot); a 4K render with an HDR-capable view transform and EXR output. — Headless Cycles
S10 Compositing Paper-grain overlay, edge bleed and glare, as a declared compositor graph. Reuse compositing.blend from the Gold splash. Gold splash compositing.blend Compositor by script

Build order (for the first slice):

  1. Write the checks first (section 5), including the reference statistics taken from the real shot.
  2. Headless pass: open blender-5.1-splash.blend, render a 1920 × 1080 reference frame, and save its colour histogram and stroke-coverage stats.
  3. Live: clean slate. Build the ice-belt GN: about 3,000 shards in a 40 m-radius torus, instanced, with LOD by distance.
  4. Link brush_stroke_generation.blend and add GN-surface_brush_strokes to the shard base, and to a large backdrop sphere for a painted nebula sky.
  5. Black hole: an emissive ring (warm), a dark core, and a cool rim light on the shards.
  6. Critter: a small proxy blob on a 120-frame path, leaving a glowing curve trail.
  7. Show a snap.py progress screenshot after each step. Render 4K Cycles to EXR, plus a 1080p PNG for comparison.

4. What works today vs. what needs newblender

Section titled “4. What works today vs. what needs newblender”
  • Works today with the live bridge:
    • Linking node groups across files.
    • Building GN trees and modifiers, and setting GN inputs.
    • Curves objects, Cycles, EXR output and the compositor by script.
    • Census-style measurement of a reference production file (already done).
  • Painful today:
    • Brushstroke Tools as an add-on is a UI-driven workflow: you pick a surface, then draw or fill strokes. Hand-drawn “draw” strokes (30 surface_draw in the shot) are brush paths (L-009). Agent-native, they become declared 3D paths or flow fields.
    • GN input sockets are addressed by generated identifiers (Socket_2), not names, so recipes break when groups change. That is part of nodes-as-code (L-006).
    • Version drift: Gold groups were authored for 4.2. Opened in 5.2.2 they may show NodeUndefined nodes (02-census).
    • No result diff after a GN rebuild. Stroke counts must be re-measured from the evaluated depsgraph (L-003).
    • The Gold library uses mode-free GN, so none of the edit-mode ceremony (L-001) applies. This is the most agent-ready production style in the corpus.
  • Not feasible today:
    • Judging whether the strokes look painted rather than noisy.
    • HDR grading decisions (what the master is).
    • The hero critter’s performance.

5. Verification plan (RFC 0001 R6, six layers)

Section titled “5. Verification plan (RFC 0001 R6, six layers)”
Layer Check Threshold
1 Validity Linked libraries resolve; NodeUndefined in used groups 0 missing; 0 undefined
1 Validity Evaluated stroke geometry: curves with < 2 points, NaN positions 0 / 0
2 Spec Shard count in the belt / radial falloff (density at r = 40 m vs. r = 50 m) 2,500–3,500 / ≥ 3:1
2 Spec Brush-stroke curves generated on shards plus the sky 20,000–200,000 curves
2 Spec Screen coverage: fraction of pixels whose alpha comes from stroke geometry (stroke-holdout pass) ≥ 60%
2 Spec Critter trail length over 120 frames / glow decays with age ≥ 10 m / monotonic
2 Spec Output: resolution, file type, view transform 3840 × 2160, EXR half, HDR-capable transform
3 Reference Hue and value histograms vs. the 5.1 Singularity shot render (Earth Mover’s Distance) EMD ≤ 0.2
3 Reference Triangle share and GN-modifier share vs. the real shot (style fingerprint) tris ≥ 90%; GN ≥ 50% of modifiers
4 Downstream 4K Cycles render time and memory on this machine ≤ 30 min, ≤ 80% of VRAM
4 Downstream Temporal stroke stability: stroke-ID flicker between frames 1 and 2 on a static camera < 5% of strokes change
5 Appearance (warning) Vision model: “does this look like a watercolour painting of space?” plus a side-by-side with the Singularity still warning if under 3/5
6 Taste (owner) Is it beautiful, and does it feel like Singularity rather than “a filter”? owner’s call (this is the main gate for this item)

6. Where the human is still needed

Section titled “6. Where the human is still needed”
  • This item is taste-bound. The art director decides the stroke vocabulary: length and width per material, how much paper shows, where colour bleeds, which edges stay crisp. Layer 5 can only warn.
  • Colour script and HDR mastering: what the HDR peak is for, and how the SDR version is derived.
  • Character design and animation of the critter (its appeal, and its grief when its home is destroyed).
  • Story: a cosmic-scale fable told visually.
  • Calibrating “painterly”: the owner must score a sample of renders blind so that the layer-5 model can be tuned (R6 mechanism 5).

7. Effort

Section titled “7. Effort”
  • First slice (live demo, about 1 day):
    • On screen: in the owner’s window, a dark scene fills with a ring of thousands of pale-blue ice shards around an empty centre, appearing as the GN instancer runs.
    • When the Studio’s brush-stroke modifier is applied, the hard shards turn into clusters of soft painted strokes. The viewport visibly shifts from 3D render to “painting”.
    • A warm glowing accretion ring appears around a black core. On playback a tiny blob moves through the belt, trailing a fading glowing line.
    • The final 4K Cycles frame sits beside the real Singularity shot, with the histogram comparison and check report.
  • Full reproduction:
    • Agent work: about 300–500 agent-hours for environments, crowd and swarm systems, stroke dressing, lighting and the compositing set-up per shot.
    • Render compute: the shot measured here has 5.4 M faces plus strokes. At 4K Cycles, expect about 20–60 min per frame, so a 10-minute film needs about 5,000–15,000 GPU-hours.
    • Human work: art direction is continuous and is the critical path, plus character animation and HDR mastering.

8. Risks and unknowns

Section titled “8. Risks and unknowns”
  • Brushstroke version drift: the Gold groups (4.2) may not match the Singularity-era library (.brushstroke_tools.* groups). The Singularity CC-BY asset release may be the better source; it has not been downloaded yet.
  • Stroke temporal stability under camera motion is the classic NPR failure (it “swims”). It is untested here.
  • The film’s runtime, shot count and production length are unverified.
  • The 5.1 splash file is one shot. It may not represent the whole film’s style (e.g. the crowd sequences).

9. Sources

Section titled “9. Sources”