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TECHNICAL SPECIFICATION · v3.88.91

Technical Specification & Full Feature Index

Comprehensive engineering reference covering our 6 geometry engines, standardized AutoCAD layer/lineweight topology, all 29 drafting commands, and technical FAQs.

1. Interactive Pro Glass Workstation (7 Groups · 29 Commands)

Switch groups below to inspect every built-in SketchUp viewport drafting command.

SUCAD_ProToolbox · 4K HUD7 GROUPS · 29 ACTIONS
GROUP 05 MODULE INSPECTOR

Scale-Healing Drafting & Detail Callouts

Complete construction dimensions, elevations, multi-leaders, and 0.000mm detail sheet packing in SketchUp.

Dynamic Drawing Scale HubT17

1:10–1:500 custom scales; rebuilds 3D annotations to hold 2.5mm paper text height

Chained Dim & Crosshair ClearanceT18

Topological chain split/merge + 1-click orthogonal room clearance measurement

Architectural Elevation ToolT20

Auto-adapts to Plan or Elevation camera planes with 3-decimal metric rounding

Zero-Crossing Multi-LeadersT21

1–3 parallel leader buses with 4 frame styles & native CAD MTEXT output

Detail Mask & 2D Sheet PackerT35

0.000mm clipped callout scenes, power-law hatch damping & multi-scale grid packing

4K DPI Pixel-Aligned HUD · Syncs Dark Blueprint & Warm Paper ThemesSketchUp 2017–2026+
SIX CORE ARCHITECTURAL ENGINES

2. Distilled from 254 Geometric Engineering Rules into Six Production Engines

Built to eliminate late-night CAD cleanup for architects, interior designers, and millwork drafters.

ENGINE 01 · TOPOLOGY & BLOCKS

100% Continuous Polylines & Nested CAD Block Reuse

Pain: Native SketchUp DXF exports thousands of shattered line segments, faceted arcs, and flat uneditable geometry.

Topologically welds closed loops into native LWPOLYLINE entities, reconstructs true 2-vertex Bulge arcs (with 6 geometric guards preventing false circles on columns), preserves nested Component hierarchies on Layer 0 (ByBlock), and enforces Uniform Scale so EXPLODE never shatters curves.

Zero Shatter on EXPLODE2-Vertex Bulge True Arcs0 Errors in AutoCAD 2000–2026
ENGINE 02 · HYBRID HLR & BYPASS

0.2s Analytic HLR & High-Poly Furniture Proxy Bypass

Pain: A single 100k-polygon sofa freezes export for 20 minutes and dumps a solid black spiderweb mesh into CAD.

Combines screen-space analytic depth culling with 3D physical raytracing fallback. High-poly furniture bound with Plan / Front / Side 2D CAD blocks automatically bypasses mesh intersection in orthographic views while reverting to full 3D geometry in perspective.

0.2s Top-View Culling3-Axis Auto Proxy DispatchAuto-XREF Heavy Assemblies
ENGINE 03 · NATIVE HATCH ENGINE

Topological Section Stitching & 35+ Native AcDbHatch Fills

Pain: Section cuts export as hollow disconnected edges, forcing tedious manual HATCH boundary repair in AutoCAD.

Automatically stitches section planes into watertight outer/inner loops and maps materials or tags to 35+ editable native AutoCAD AcDbHatch patterns (.pat sync included) with 1:1 scale, density, and angle isomorphism across Viewport, DXF, and PDF.

35+ Semantic Material Rules1:1 Tri-End Hatch Isomorphism24-Bit TrueColor & Mirroring
ENGINE 04 · IN-VIEWPORT DRAFTING

Scale-Healing Dimensions, Elevations & Zero-Crossing Multi-Leaders

Pain: Switching to LayOut just to place dimensions and callouts turns heavy projects into an unresponsive slideshow.

Author continuous chained dimensions, architectural elevation markers, 1-click crosshair room clearance measurements, and parallel multi-leader material callouts directly in SketchUp. Changing drawing scale (1:10–1:500) dynamically rebuilds geometry to keep crisp 2.5mm paper text height.

Constant 2.5mm Paper Text1-Click Crosshair ClearanceAuto Plan/Elevation Isolation
ENGINE 05 · DETAIL CALLOUTS & PACKING

0.000mm Detail Callout Masking & Multi-Scale Sheet Auto-Packing

Pain: Creating construction details requires duplicating and slicing models, while dense hatches turn solid black at 1:20.

Drag a callout rectangle to spawn an orthographic masked [Detail] scene with Liang-Barsky & Sutherland-Hodgman 0.000mm hard clipping. Power-law damped hatch scaling keeps 1:10–1:50 hatches legible without mutating master scenes, and packs multiple details onto A-series sheets.

0.000mm Hard Boundary ClipPower-Law Damped Hatch Scale2D Multi-Scale Grid Packing
ENGINE 06 · DUAL-BEACON HUD & VECTOR PDF

4K Dual-Beacon Probe HUD & Zero-Dependency Vector PDF Booklets

Pain: Editing nested tags/materials takes endless tray clicks, and printing sharp architectural PDFs requires clunky drivers.

Floating Cyan (Component/Tag) and Magenta (Material) beacons snap to 3D corners for instant in-place edits. Preview real AutoCAD LWT lineweights & .ctb plot styles in viewport, then publish A0–A4 Vector or Hybrid Raster+Vector PDF sets with automated drawing index bookmarks.

Dark Blueprint & Warm Paper UILive LWT & Native .CTB ImportMulti-Page Vector PDF + Index

3. Standardized CAD Layer Topology & Lineweight Specification

Every exported DXF adheres to clean architectural CAD standards right out of the box.

Standardized CAD Layer Topology & Lineweight Specification
CAD Layer NameLineweight (mm)ACI / Color PolicyArchitectural Semantics & Generation Rule
00.25 mmByBlock (0)Internal block primitives; dynamically inherit host instance layer/color with zero layer clutter
SECTION_CUT0.50 mmACI 7 (Black/White)Heavy outer section profile; 100% closed continuous LWPOLYLINE
SECTION_HATCH0.15 mmACI 8 / TrueColorEditable native AutoCAD AcDbHatch fills with 35+ semantic rules & 1:1 isomorphism
SECTION_TITLE0.25 mmACI 7 / 8Section callout titles and architectural double-underline bars
SU_PROFILE_LINES0.35 mmByLayerOuter silhouette profile edges emphasizing spatial massing
SU_VISIBLE_LINES0.25 mmByLayer / RGBHLR-culled visible projection edges supporting ByLayer or material TrueColor
DIM-PM-auto / LM-auto0.18 mmACI 38 (#7F5F00)Plan & elevation dimension lines/ticks with automatic camera-axis visibility isolation
DIM-TEXT-PM / LM-auto0.25 mmACI 2 (#EAB308)Dedicated crisp dimension & elevation numerals locked to 2.5mm paper height
DIM-LEADER-*-auto0.18 mmACI 2 / BYLAYERZero-crossing parallel multi-leader bus lines and native CAD MTEXT blocks
DIM-LEADER-*-ARROW-auto0.18 mmACI 1 (#EF4444)Isolated solid leader arrowheads for 1-click global recolor or freeze in AutoCAD

4. Why Architectural Studios Replace Native Export & LayOut with SU·CAD Pro

Side-by-side engineering benchmark across every stage of construction documentation.

Why Architectural Studios Replace Native Export & LayOut with SU·CAD Pro
Engineering DimensionSketchUp Native DXFSketchUp + LayOutSU·CAD Pro (v3.88.91)
Polyline Continuity & True ArcsThousands of broken segments; arcs faceted into polygonsFrequent duplicate overlapping viewport strokes in DWG100% closed LWPOLYLINE + 2-vertex Bulge true arcs; zero shatter on EXPLODE
High-Poly Furniture PerformanceFreezes for minutes; outputs dense black mesh blobsSevere viewport lag & beachballing on multi-page files0.2s hybrid HLR + instant 3-view 2D CAD Block Proxy Bypass
Section Cut Native HatchingNone (hollow unclosed cut edges only)Raster/pattern fills that fail to export as editable AcDbHatchWatertight loop stitching + 35+ native AcDbHatch (1:1 Viewport/DXF/PDF)
Dimensions, Elevations & LeadersBasic 3D text unsuitable for construction standardsCapable, but disconnected from 3D edits and slow to refreshIn-viewport drafting: 2.5mm scale-healing text, crosshair clearance & multi-leaders
Detail Callouts & Sheet PackingRequires destructive model slicingStacking multiple cropped viewports tanks performanceNon-destructive quad mask + 0.000mm hard clip + automated 2D multi-scale packing
True Lineweights (LWT) & CTBNo print lineweight hierarchyRequires separate manual tag override setupReal-time viewport LWT rendering + native AutoCAD .ctb plot style import
Multi-Page Vector PDF & IndexRequires external PDF printer driversSlow batch export on heavy setsZero-dependency pure Ruby Vector/Hybrid PDF + A0–A4 titleblocks & auto index

5. Complete 7-Group · 29-Command Searchable Reference

Full text index of all 29 viewport drafting tools for quick Ctrl+F lookup.

01

Core Setup & 4D Asset Hub

Centralized control over CAD block topology, .ctb plot styles, semantic Hatch rules, and the 4-tab Asset Hub.

T01
Base & Projection Settings：Configure export scope, nested blocks, 4-tier proxy styles, and 1:1 mm precision
T02
Style & Hatch Rule Manager：Import AutoCAD .ctb lineweights and customize 35+ semantic AcDbHatch mappings
T34
4D Asset Hub：Unified CRUD shelf for Materials, PAT Hatches, 2D CAD Blocks, and 75-item Lexicon
T03
Auto-Rename by Host Tag：Automatically sync new/edited component names with their assigned SketchUp Tag
02

Smart Tagging & Viewport Styles

Switch between textured modeling and 4 construction hidden-line modes in <5ms with 15 sheet presets.

T04
Auto-Switch Active Tag：Sync active tag on selection; safely revert to Untagged when cleared
T05
AutoTag Rules Assistant：Batch-classify components into structured CAD tags via keyword rules
T06
15 Drawing Sheet Switcher：One-click layer states for Floorplan, RCP, MEP, Elevation, Section & Landscape
T07
5-State CAD Display Mode：Shaded / Dark Color / Dark Mono / White Color / White Mono instant toggle
03

Visibility & Cross-Scene Solo Guard

Surgical tag isolation and persistent per-scene Solo locks immune to global Unhide All.

T08
Isolate Selected Tag：Solo the selected component tag for clutter-free detailing
T09
Smart Show All Tags：Restore model layers while keeping drafting annotations muted in Shaded mode
T32
Per-Scene Solo Lock：Newly drawn elements appear exclusively in the active scene without bleeding
T12
Select All on Same Tag：Instantly grab every entity sharing the target tag in active context
04

Dual-Beacon HUD & Deep Eyedroppers

Cyan (Component/Tag) + Magenta (Material) 3D corner beacons for zero-tray in-place editing.

T16
4K Dual-Beacon Probe HUD：Rename definitions, bind 2D CAD proxies, tint HSL/RGB & flip normals across 5 scopes
T13
3-Mode Tag Assignment Rule：Full Penetrate / Outer Shell Only / Primitives to Layer 0 + ByBlock
T14
Deep-Penetrating Tag Dropper：Sample nested sub-component CAD layers through deep group hierarchies
T33
Quick Layer Floating Palette：Selection-free layer assignment with 24 ACI swatches, 7 linetypes & 23 lineweights
05

Scale-Healing Drafting & Detail Callouts

Complete construction dimensions, elevations, multi-leaders, and 0.000mm detail sheet packing in SketchUp.

T17
Dynamic Drawing Scale Hub：1:10–1:500 custom scales; rebuilds 3D annotations to hold 2.5mm paper text height
T18
Chained Dim & Crosshair Clearance：Topological chain split/merge + 1-click orthogonal room clearance measurement
T20
Architectural Elevation Tool：Auto-adapts to Plan or Elevation camera planes with 3-decimal metric rounding
T21
Zero-Crossing Multi-Leaders：1–3 parallel leader buses with 4 frame styles & native CAD MTEXT output
T35
Detail Mask & 2D Sheet Packer：0.000mm clipped callout scenes, power-law hatch damping & multi-scale grid packing
06

Live LWT Lineweights & Qt6 Dashes

True AutoCAD print lineweight preview inside SketchUp with SketchUp 2026 Qt6 dash calibration.

T23
Live Viewport Lineweight (LWT)：Hardware-accelerated thick/thin stroke hierarchy preview inside SketchUp
T24
Scale-Linked Lineweight：Synchronizes viewport stroke pixels with paper-space millimeter plot weights
T22
Qt6 Dash Phase Calibrator：Ensures identical dashed linetype cadence across SU 2026, AutoCAD DXF, and PDF
07

Dual-Engine Export, Titleblocks & License

Single or multi-scene batch export to clean DXF and bookmarked multi-page Vector PDF sets.

T27
1-Click Continuous DXF Export：Single viewport, tiled master DXF, or split-file batch export with 0 CAD errors
T28
2D Vector / Hybrid PDF Engine：Zero-dependency crisp Vector or Raster+Vector PDF sets with pure white paper backgrounds
T30
Adaptive A0–A4 Titleblock & Index：Auto portrait/landscape A-series borders, 5 studio titleblocks & paginated index
T29
Commercial User Center：Manage 2-device bindings, redeem license keys, and unbind hardware instantly
ENGINEERING & COMMERCIAL FAQ

Frequently Asked Questions

Everything you need to know about offline installation, CAD compatibility, and dual-device licensing.

Do I need to install Python or any external PDF printer drivers?
Zero external setup is required. The official .rbz archive bundles a self-contained portable geometry runtime plus a pure-Ruby zero-dependency 2D Vector PDF engine. Install via SketchUp Extension Manager even on completely offline air-gapped workstations.
Which versions of SketchUp and AutoCAD are supported? Is SketchUp 2026 supported?
SU·CAD Pro supports SketchUp 2017 through 2026+ on Windows 10/11 x64, including full native compatibility with SketchUp 2026’s Qt6 architecture. Exported DXF files open with 0 errors and 0 warnings in AutoCAD 2000–2026+, BricsCAD, ZWCAD, and GstarCAD.
Will polylines shatter into tiny segments if I run EXPLODE in AutoCAD?
Never. SU·CAD Pro welds closed loops into continuous LWPOLYLINE entities and enforces Uniform Scale across nested block references (flattening sheared assemblies automatically), so geometry stays 100% continuous even after EXPLODE.
Can I use one license on both my office desktop and personal laptop?
Yes! Both the Annual Flagship ($99/yr) and Lifetime Commercial ($249) plans include 2 simultaneous device activations (Desktop + Laptop) plus instant self-service machine unbinding inside the in-plugin User Center.
What is included in the $0 Community Trial?
You can download the .rbz immediately without registering a credit card. It unlocks baseline active-viewport DXF export, watermarked single-page Vector PDF export, and the 4K Dual-Beacon HUD & Pro Glass Toolbox so you can verify HLR speed on your heaviest models before upgrading.
Do you provide commercial tax invoices and multi-seat studio onboarding?
Yes. Commercial invoices are provided for all paid plans, and the Studio 5-Seat Perpetual Pack ($599) includes independent seat keys, custom studio titleblock configuration, and air-gapped team deployment support.
Download Free Offline .RBZ