夜のオフィス街、灯りのついた窓。本番の GPU で描いた本物の結果と、そのまま動く bpy スクリプト、設定、GPU 秒。スクリプトの URL を scene_url に渡せば同じものが出ます。
| 頼んだ文 | https://render.janction.jp/samples/ex07_night_city.py を night プリセット、1920x1080、128 サンプルで描いて。 |
|---|---|
| MCP の呼び出し | render_final(scene_url="https://render.janction.jp/samples/ex07_night_city.py", frame_start=1, frame_end=1, samples=128, output="png", width=1920, height=1080, environment="night") |
| GPU 秒 / 往復 | 9.6 s / 10 s |
| 料金の目安（予定単価） | 1.0 JPY (ベータ中は 0 円) |
| 描いた日 | 2026-10-07 |
| Blender | 5.0 |
| frame_start | 1 |
|---|---|
| frame_end | 1 |
| samples | 128 |
| denoise | True |
| output | png |
| width | 1920 |
| height | 1080 |
| environment | night |
ex07_night_city.py。シーン・カメラ・コマ範囲だけを組み、解像度・サンプル・ノイズ除去・GPU はサービスが決めます。
"""JANCTION Render example 07: a block of office towers at night with lit windows, under the night preset (one still).
Reproduce: render_final(scene_url="https://render.janction.jp/samples/ex07_night_city.py",
width=1920, height=1080, samples=128, environment="night")
The windows are a checker texture driving the emission of one material; three variants give the variety.
"""
import random
import bpy
from mathutils import Matrix, Vector
for ob in list(bpy.data.objects):
bpy.data.objects.remove(ob, do_unlink=True)
scene = bpy.context.scene
scene.frame_start = 1
scene.frame_end = 1
def material(name, color, roughness=0.5, metallic=0.0, **inputs):
mat = bpy.data.materials.new(name)
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (*color, 1.0)
bsdf.inputs["Roughness"].default_value = roughness
bsdf.inputs["Metallic"].default_value = metallic
for key, value in inputs.items():
bsdf.inputs[key].default_value = value
return mat
def add(op, name, mat=None, **kw):
getattr(bpy.ops.mesh, op)(**kw)
ob = bpy.context.object
ob.name = name
if mat is not None:
ob.data.materials.append(mat)
return ob
def look_at(ob, target):
ob.rotation_euler = (Vector(target) - ob.location).to_track_quat("-Z", "Y").to_euler()
def camera(location, target, lens=50.0):
data = bpy.data.cameras.new("Camera")
data.lens = lens
cam = bpy.data.objects.new("Camera", data)
scene.collection.objects.link(cam)
cam.location = location
look_at(cam, target)
scene.camera = cam
return cam
def tower_material(name, scale, warm, lit):
"""Dark facade whose windows glow: a checker (the window grid) times a thresholded noise (which floors are lit)
drives the emission strength. `lit` is the share of the facade that is lit (0..1)."""
mat = material(name, (0.05, 0.05, 0.07), roughness=0.6, **{"Emission Color": (*warm, 1.0)})
nodes = mat.node_tree.nodes
links = mat.node_tree.links
bsdf = nodes["Principled BSDF"]
coord = nodes.new("ShaderNodeTexCoord")
checker = nodes.new("ShaderNodeTexChecker")
checker.inputs["Scale"].default_value = scale
noise = nodes.new("ShaderNodeTexNoise")
noise.inputs["Scale"].default_value = 0.45
noise.inputs["Detail"].default_value = 1.0
ramp = nodes.new("ShaderNodeValToRGB")
ramp.color_ramp.interpolation = "CONSTANT"
ramp.color_ramp.elements[0].position = 0.0
ramp.color_ramp.elements[0].color = (0.0, 0.0, 0.0, 1.0)
ramp.color_ramp.elements[1].position = 1.0 - lit
ramp.color_ramp.elements[1].color = (1.0, 1.0, 1.0, 1.0)
windows = nodes.new("ShaderNodeMath")
windows.operation = "MULTIPLY"
gain = nodes.new("ShaderNodeMath")
gain.operation = "MULTIPLY"
gain.inputs[1].default_value = 7.0
links.new(coord.outputs["Object"], checker.inputs["Vector"])
links.new(coord.outputs["Object"], noise.inputs["Vector"])
links.new(noise.outputs["Fac"], ramp.inputs["Fac"])
links.new(checker.outputs["Fac"], windows.inputs[0])
links.new(ramp.outputs["Color"], windows.inputs[1])
links.new(windows.outputs["Value"], gain.inputs[0])
links.new(gain.outputs["Value"], bsdf.inputs["Emission Strength"])
return mat
rng = random.Random(7)
facades = [tower_material("TowerA", 3.2, (1.0, 0.82, 0.5), 0.45), tower_material("TowerB", 4.0, (0.95, 0.9, 0.7), 0.35),
tower_material("TowerC", 2.8, (0.6, 0.8, 1.0), 0.5)]
ground = material("Ground", (0.02, 0.02, 0.03), roughness=0.25)
street = material("Street", (0.1, 0.05, 0.02), roughness=0.9,
**{"Emission Color": (1.0, 0.5, 0.15, 1.0), "Emission Strength": 2.0})
add("primitive_plane_add", "Ground", ground, size=80)
N = 13
for ix in range(N):
for iy in range(N):
if rng.random() < 0.12:
continue
h = rng.uniform(1.2, 8.0) if rng.random() < 0.8 else rng.uniform(8.0, 14.0)
w = rng.uniform(0.6, 0.95)
x = (ix - (N - 1) / 2) * 1.6 + rng.uniform(-0.1, 0.1)
y = (iy - (N - 1) / 2) * 1.6 + rng.uniform(-0.1, 0.1)
tower = add("primitive_cube_add", "Tower_%d_%d" % (ix, iy), rng.choice(facades), size=1, location=(x, y, h / 2))
# 大きさはメッシュに焼き込む（object の scale で伸ばすと窓の市松が縦に伸びて縞になる）
tower.data.transform(Matrix.Diagonal((w, w, h, 1.0)))
for i in range(-6, 7):
strip = add("primitive_plane_add", "StreetX%d" % i, street, size=1, location=(0, i * 1.6 + 0.8, 0.01))
strip.scale = (22, 0.12, 1)
strip = add("primitive_plane_add", "StreetY%d" % i, street, size=1, location=(i * 1.6 + 0.8, 0, 0.01))
strip.scale = (0.12, 22, 1)
camera((18.0, -26.0, 16.0), (0.0, 0.0, 3.0), lens=40)
JANCTION Render v0.4.20 · JasmyLab Inc. · 更新 2026-10-07 · 検証 Blender 5.0, JANCTION Render 0.4.20 · English