06 MRT

Configuration for the MRT + UTCI analysis.

Predefined multi-layer construction (assembly) for the SurfaceTemp admittance solve.

Thermal + optical material properties for a building/ground MRT surface.

Canopy material properties for an MRT tree surface.

Leaf/canopy material properties for an MRT vegetation surface.

Point-specific statistics (and optionally the raw hours) from a SurfaceTemp Result, without putting the full 8760-hour year on the canvas.

Mean radiant temperature at each sensor, hour by hour. MRT = shortwave + longwave. SHORTWAVE — what the sensor absorbs from sun and sky. Either a direct raycast (default, pure C#) or the Radiance DDS chain (MRT Settings -> Radiance Reflections), which adds diffuse sky and interreflection off the surroundings. Radiance returns annual total and direct illuminance per sensor, which are mapped onto the probes' shortwave series. LONGWAVE — what the sensor exchanges with everything around it, weighted by view factors traced from each sensor against the scene and the sky dome. SURFACE TEMPERATURES come from ENERGYPLUS, not Radiance — Radiance is a light transport engine and computes no temperatures at all. With MRT Settings -> EnergyPlus Surfaces on, Eddy3D builds an epJSON from the polygons that actually matter to the sensors (those inside the cumulative view-factor percentile and above the small-face cutoff; everything else is demoted to a shading surface), runs EnergyPlus against the EPW, and maps the surface-specific temperatures out of the ESO back onto the geometry. With it off, every surrounding surface is simply assumed to sit at air temperature. SKY TEMPERATURE is always Clark-Allen from dew point, dry bulb, opaque cloud cover and relative humidity — it needs no engine.

Create comfort sensor probes from meshes (one probe per face center, facing the face normal) and/or points (facing corresponding Normals), mixed freely on one input.

Tags Breps or Meshes as a radiation surface for an MRT analysis. Breps are meshed at Patch Size; Meshes are used face-for-face as given.

Computes the Sky View Factor (SVF) for each input point using the Tregenza 145-patch sky subdivision. Casts 145 rays toward the upper hemisphere and returns the fraction of unobstructed sky directions (0 = fully obstructed, 1 = fully open sky).

Solves outdoor surface temperature per analysis point via the frequency-domain admittance method (no thermal mesh, no warm-up). Feeds a future MRT component alongside Sky Exposure. Method: Beckett, O., Owens, S. and Acred, A. (2026). Applying Frequency Domain Methods for Calculating Outdoor Surface Temperatures. Proceedings of the 12th National Conference of IBPSA-USA, Minneapolis, MN. https://publications.ibpsa.org/conference/paper/?id=simbuild2026_1312

Probe-specific statistics (and optionally the raw hours) from an MRT Result, without putting the full 8760-hour year on the canvas.

Solves MRT on a prepared VF Model: shortwave (direct raycast, or Radiance DDS when MRT Settings enables reflections) + view-factor longwave. Wire the VF Model straight from MRT View Factors for ambient/FFT surface temperatures, or through SurfaceTemp (EnergyPlus) for E+ temperatures. Result feeds Deconstruct MRT and UTCI.

Assembles tagged surfaces + sensors into a radiation model, builds the sky dome, and solves probe-to-polygon view factors. Feed the VF Model to SurfaceTemp (EnergyPlus) and/or MRT Solve. The sweep is the expensive part of an MRT run — solving it once here lets the downstream stages re-run without repeating it.

Surface temperatures via EnergyPlus, mapped onto a solved VF Model. The counterpart of the FFT SurfaceTemp component for the staged MRT pipeline: it consumes MRT View Factors' output (the E+ surface selection depends on the view factors) and its output feeds MRT Solve. Skipping this stage leaves surfaces at ambient temperature unless they carry FFT temperatures from MRT Surface.

Colors the model's surfaces by view factor: the mean each face receives from all sensors, or one chosen sensor's view factors to every face. Values output is per face, in mesh face order, for custom gradients.

Equal-angle fisheye of the hemisphere above one sensor, as a colored mesh — a flat disk or a 3D dome (Display dropdown): sky, building, ground and vegetation per direction, plus the sensor's cosine-weighted sky view fraction.