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A 5-second animation an AI wrote from one sentence: a paper boat at dawn (120 frames, EEVEE, MP4)

A 5-second animation an AI wrote from one sentence: a paper boat at dawn (120 frames, EEVEE, MP4). A real render from the production GPU, the bpy script that produced it, the settings and the GPU seconds. Pass the script's URL as scene_url to get the same result.

Render this example with your AI

ChatGPT · Claude · Grok · Perplexity

Use JANCTION Render (MCP server https://render.janction.jp/mcp) to render this example: render_preview(scene_url="https://render.janction.jp/samples/ex23_paper_boat.py"). Then suggest how to change the colors, shapes and camera for my own subject. Ask me before the final render.

Each link opens the app with the text below filled in (if it is not, copy and paste it). If JANCTION Render is not connected in that app yet, add https://render.janction.jp/mcp as a connector first.

Settings

Blender warnings

• the script was adjusted automatically before it ran: node inputs and outputs whose names differ between Blender versions (such as Distort / Distortion, Fac / Factor) are looked up under the name this

The script (bpy, runs as is)

ex23_paper_boat.py. It builds the scene, the camera and the frame range; resolution, samples, denoising and the GPU are set by the service.

"""JANCTION Render example 23: a 5-second animation an AI wrote from one sentence (a paper boat at dawn).

The request was: "Make a 5-second Blender animation: a folded paper boat drifting across calm water at dawn,
bobbing gently." Claude wrote this script (no files, no add-ons) and JANCTION rendered it.
Reproduce: render_final(scene_url="https://render.janction.jp/samples/ex23_paper_boat.py",
                        frame_start=1, frame_end=120, width=1280, height=720, engine="eevee", output="mp4", fps=24)
Everything is built from primitives: the water is a grid with two Wave modifiers, the boat is a few faces.
"""
import math

import bmesh
import bpy

for ob in list(bpy.data.objects):
    bpy.data.objects.remove(ob, do_unlink=True)
scene = bpy.context.scene
scene.frame_start, scene.frame_end = 1, 120
scene.render.fps = 24


def principled(name, color, roughness, metallic=0.0, transmission=0.0):
    m = bpy.data.materials.new(name)
    m.use_nodes = True
    b = next(n for n in m.node_tree.nodes if n.type == "BSDF_PRINCIPLED")
    b.inputs["Base Color"].default_value = (*color, 1.0)
    b.inputs["Roughness"].default_value = roughness
    b.inputs["Metallic"].default_value = metallic
    for key in ("Transmission Weight", "Transmission"):
        if key in b.inputs:
            b.inputs[key].default_value = transmission
            break
    return m


# water: a fine grid with a slow Wave modifier (animated by the frame number)
bpy.ops.mesh.primitive_grid_add(x_subdivisions=160, y_subdivisions=160, size=40, location=(0, 0, 0))
water = bpy.context.active_object
water.name = "Water"
wave = water.modifiers.new("Wave", "WAVE")
wave.height = 0.05
wave.width = 0.7
wave.narrowness = 1.2
wave.speed = 0.05
wave.start_position_x = -30.0      # a far-away centre: the rings arrive as long, nearly straight swells
wave.use_normal = False
swell = water.modifiers.new("Swell", "WAVE")
swell.height = 0.02
swell.width = 0.5
swell.speed = 0.03
swell.start_position_x, swell.start_position_y = 18.0, 25.0
bpy.ops.object.shade_smooth()
water.data.materials.append(principled("Water", (0.012, 0.03, 0.05), 0.12))    # dark and glossy: it mirrors the sky

# paper boat: a hull (an upside-down trapezoid prism) and a triangular sail, built from vertices
bm = bmesh.new()
top_l, bot_l, top_w, bot_w, h = 0.70, 0.42, 0.18, 0.06, 0.22
v = [bm.verts.new(p) for p in [
    (-top_l, -top_w, h), (top_l, -top_w, h), (top_l, top_w, h), (-top_l, top_w, h),     # rim
    (-bot_l, -bot_w, 0.0), (bot_l, -bot_w, 0.0), (bot_l, bot_w, 0.0), (-bot_l, bot_w, 0.0),  # keel
]]
for f in ([0, 1, 5, 4], [1, 2, 6, 5], [2, 3, 7, 6], [3, 0, 4, 7], [4, 5, 6, 7]):
    bm.faces.new([v[i] for i in f])
s = [bm.verts.new(p) for p in [(-0.34, 0.0, h), (0.34, 0.0, h), (0.0, 0.0, h + 0.55)]]
bm.faces.new(s)
me = bpy.data.meshes.new("PaperBoat")
bm.to_mesh(me)
bm.free()
boat = bpy.data.objects.new("PaperBoat", me)
scene.collection.objects.link(boat)
solid = boat.modifiers.new("Paper", "SOLIDIFY")
solid.thickness = 0.008
boat.data.materials.append(principled("Paper", (0.95, 0.93, 0.88), 0.6))
boat.scale = (0.9, 0.9, 0.9)

# drift from left to right and bob on the swell (keyframes every 6 frames)
for f in range(1, 121, 6):
    t = (f - 1) / 119.0
    boat.location = (-3.2 + 6.4 * t, 0.2 * math.sin(t * math.pi), 0.02 + 0.035 * math.sin(f / 9.0))
    boat.rotation_euler = (0.06 * math.sin(f / 11.0), 0.05 * math.sin(f / 7.0 + 1.0), math.radians(8) * math.sin(t * math.pi))
    boat.keyframe_insert("location", frame=f)
    boat.keyframe_insert("rotation_euler", frame=f)

# dawn: a low warm sun from the camera's left and a sky that goes from orange at the horizon to deep blue overhead
sun_data = bpy.data.lights.new("Sun", "SUN")
sun_data.energy = 4.0
sun_data.color = (1.0, 0.66, 0.42)
sun_data.angle = math.radians(2)
sun = bpy.data.objects.new("Sun", sun_data)
scene.collection.objects.link(sun)
sun.rotation_euler = (math.radians(72), 0.0, math.radians(-40))
world = scene.world or bpy.data.worlds.new("World")
scene.world = world
world.use_nodes = True
nt = world.node_tree
bg = next(n for n in nt.nodes if n.type == "BACKGROUND")
coord = nt.nodes.new("ShaderNodeTexCoord")
xyz = nt.nodes.new("ShaderNodeSeparateXYZ")
ramp = nt.nodes.new("ShaderNodeValToRGB")
nt.links.new(coord.outputs["Generated"], xyz.inputs[0])
nt.links.new(xyz.outputs["Z"], ramp.inputs["Fac"])
nt.links.new(ramp.outputs["Color"], bg.inputs["Color"])
stops = ramp.color_ramp.elements
stops[0].position, stops[0].color = 0.0, (1.0, 0.55, 0.30, 1.0)       # horizon (Generated Z of the world is the view direction, 0 at the horizon)
stops[1].position, stops[1].color = 0.30, (0.08, 0.12, 0.30, 1.0)     # overhead
mid = stops.new(0.07)
mid.color = (0.92, 0.45, 0.42, 1.0)                                    # pink band above the horizon
bg.inputs["Strength"].default_value = 0.9

# camera: low over the water, panning slowly after the boat (it tracks a point that moves at half the boat's speed)
aim = bpy.data.objects.new("Aim", None)
scene.collection.objects.link(aim)
for f in (1, 120):
    aim.location = (-1.6 + 3.2 * (f - 1) / 119.0, 0.0, 0.25)
    aim.keyframe_insert("location", frame=f)
cam = bpy.data.objects.new("Camera", bpy.data.cameras.new("Camera"))
scene.collection.objects.link(cam)
scene.camera = cam
cam.data.lens = 40
cam.location = (0.0, -6.0, 0.75)
track = cam.constraints.new("TRACK_TO")
track.target = aim
track.track_axis = "TRACK_NEGATIVE_Z"
track.up_axis = "UP_Y"

All examples · 日本語

JANCTION Render v0.4.152 · JasmyLab Inc. · Updated 2026-10-14 · Tested with Blender 3.6 / 4.2 / 4.5 / 5.0 / 5.2, JANCTION Render 0.4.152 · 日本語

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