3dCMS Knowledge Base
Open the editor
Effects & Atmosphere

Placeable lights

Drop point and spot lamps into a scene — with shadows, a day/night schedule, projected gobo patterns, and volumetric light shafts.

Open in the interactive manual →

The interactive version has full-text search, a table of contents, and light/dark themes.


Beyond the scene-wide sun & sky, you can drop placeable lamps into a scene — a lantern, a streetlamp, a spotlight on a display. A light node adds to the sun & sky; it's a lamp, not a second sun. Add one from Create ▸ Light ▸ Point Light or Spot Light, then tune it in the Light section of Properties.

Point vs spot

TypeWhat it is
PointA bulb that shines in every direction from its position.
SpotAn aimed cone of light. It beams down the node's local -Y — rotate the node to aim it.

The controls

ControlDoes
ColorThe light's tint.
IntensityBrightness in candela (physical) — around 30 reads like a bright lamp a few metres out.
RangeHow far the light reaches, in metres. 0 = unlimited.
DecayFalloff exponent — 2 is physically correct; lower carries the light further.
Angle° / SoftnessSpot only. The cone's half-angle, and how feathered its edge is (0 = hard, 1 = fully soft).

Shadows (budgeted)

Tick Cast shadows to have a light throw real shadows. Shadows are expensive, so at most four lights per scene cast at once — the first four shadow-enabled lights in scene order win, and the Inspector shows the running count (and warns a light that's over budget). Everything else stays lit, just shadowless.

Day / night schedule

Each light has a Time of day setting so it can switch itself with the Live sky:

Always on Night only (streetlamp) Day only

A "Night only" streetlamp lights up at dusk and switches off at dawn on its own. (The Always-daytime toggle and Studio mode both count as day.)

Gobos & light shafts (spot only)

A gobo projects a pattern through a spot's beam — the dappled light of leaves, window slats, rippling water. Pick a bundled pattern (Dapple, Blinds, Window pane, Caustics) or a Custom image/video, and optionally set Motion ▸ Drift to give it a slow wind-like pan and spin.

Turn on Lit air (volumetric beam) and the beam becomes visible shafts of light — god rays through the cone, carved by the gobo if one is set. Beam density controls how thick the lit air reads.

A window with real sunbeams Aim a spot through a window, set the gobo to Window pane (or Blinds), enable Lit air, and add a touch of Drift — you get dust-lit shafts sliding gently across the floor. The Assistant and Claude via MCP can place and tune these lights too.
Spotted something off, or want a topic covered? Email buck.rackley@gmail.com.