Autodesk AU 2025: The Next Frontier in Building Design & Neural CAD
At Autodesk University 2025, the spotlight rested not only on AI and cloud technologies but on how those forces are reshaping the AEC (architecture, engineering, construction) world. Two of the most compelling announcements were:
- Forma Building Design — a new, cloud-based design tool targeting LoD 200 detail as a bridge between concept and BIM
- Neural CAD — a generative AI foundation model approach embedded in both Forma (for buildings) and Fusion (for geometry)
Below is a closer look at both innovations, their implications, and what they may mean for practice in Australia and the APAC region.
Introducing Forma Building Design: Elevating to LoD 200
What is Forma Building Design?
- Forma Building Design is a new browser-based tool within the Autodesk Forma ecosystem, unveiled at AU 2025.
- It is positioned as the next step up from early-stage planning (now encapsulated by Forma Site Design, the rebranded version of the original Forma tool) into a more detailed building design environment.
- The target detail level is LoD 200, with prospects of pushing into LoD 300 in future iterations.
- It combines parametric, AI (generative) and manual modelling tools, along with real-time analyses (daylight, carbon, solar, etc.).
- Users — including non-BIM specialists — are meant to engage earlier in design and explore alternative solutions without needing deep parametric skillsets.
Why LoD 200?
- In BIM parlance, LoD 200 generally indicates that elements have approximate geometry (size, shape, location) but not full detail (no full connection, joinery, or fabrication detail).
- By targeting LoD 200, Autodesk positions this tool as a stepping stone: enough fidelity to make performance decisions (e.g. daylight, solar, volumetric form) while not overburdening early phases with construction-level detail.
- It’s a practical compromise — more meaningful than massing/concept alone, but lighter than full detailed BIM in Revit or later.
- Autodesk and commentators expect that, over time, Forma Building Design might encroach further into LoD 300 territory as the neural CAD and analysis capabilities mature.
Key Features & Workflow Highlights
- Design with intent
Designers can manipulate facades, layouts, and spatial logic (e.g. corridor types) while seeing feedback in real time (daylight, carbon, solar exposure) - Layout exploration / alternative generation
The tool’s “Building Layout Explorer” can quickly generate and regenerate interior layout alternatives (unit mix, circulation, daylight trade-offs), allowing side-by-side comparison. - Seamless transitions to BIM tools
Models authored in Forma Building Design will be able to flow into Revit (and later into structural/MEP workflows) via “connected client” setups.
Revit is the first Autodesk desktop tool to become a Forma Connected Client, enabling users to tap into Forma’s analyses directly within Revit.
Analysis results (solar, wind, etc.) from Forma tools will be accessible in Revit, eliminating repeated exports/imports. - Inclusivity & accessibility
Autodesk emphasizes that the interface and capabilities are designed for a broad audience — even those without deep parametric or BIM experience — lowering barriers to engaging with 3D building design. - Cloud-native, multi-tool integration
Forma Building Design is a core part of the Forma industry cloud, which now spans planning, design, construction, and operations (by integrating Autodesk Construction Cloud).
It taps into Forma Data Management (formerly Autodesk Docs) as the central hub for AECO project data.
Potential Challenges & Considerations for Australia / APAC
- Adoption & talent readiness: Many firms in Australia are still consolidating BIM practices; integrating a new tool (even at LoD 200) requires change management and training.
- Connectivity & latency: As a browser/cloud-first tool, performance depends on reliable internet connectivity; remote or regional sites may have latency or bandwidth constraints.
- Transitioning to Revit / downstream tools: The success of Forma Building Design will heavily depend on how cleanly geometry, data, and analyses flow into Revit, structural/MEP tools, and documentation workflows.
- Cost & licensing: Autodesk has hinted at generous cloud usage limits for early adopters, but users may be wary of usage caps or rising costs once in production.
- Local compliance & standards: In Australia and APAC, local codes, climate zones, and regulatory standards may require customisation or adjustments in analysis modules (e.g. solar studies, energy modelling).
Introducing Neural CAD: A Generative Foundation Model for Forma & Fusion
What is Neural CAD?
- Neural CAD refers to generative AI foundation models that reason natively about CAD geometry, systems, and workflows, not merely via prompts or post-processing.
- Autodesk is developing two types of neural CAD:
- Neural CAD for buildings (embedded in Forma)
- Neural CAD for geometry (embedded in Fusion)
- These models are trained to understand both geometric form and systemic relationships (e.g. adjacency, building systems, spatial logic) — enabling them to “reason” about what makes sense in a design context.
Neural CAD in Forma (Buildings)
- In the context of Forma Building Design, neural CAD helps bridge the gap between early conceptual sketches and more detailed building layouts — enabling smoother transitions between phases.
- Using sketch, text, or other inputs, the system can propose building layouts, circulation schemes, façade massing, unit arrangements, or corridor types, automatically regenerating alternatives based on constraints like daylight or carbon goals.
- Because the neural CAD engine is embedded, these generative proposals remain natively editable — not locked black boxes.
- One ambition is that neural CAD might automate a large portion (Autodesk hints at 80–90%) of repetitive or assistant-level geometry tasks while letting designers focus on higher-level decision-making.
Neural CAD in Fusion (Geometry)
- For Fusion, the neural CAD model deals with pure geometry: designers will be able to generate boundary representation (BREP) geometry from prompts (text, sketch, image), and then refine or manipulate it further.
- This approach is distinct from classical parametric engines — it’s more flexible, intuitive, and adaptive to design intent expressed in natural language or sketch.
- Autodesk also plans to allow users to fine-tune or customise neural CAD models based on their organisation’s data and workflows, making them adaptive over time.
Why Neural CAD Matters
- Seamless transitions across abstraction levels: Designers often lose momentum when moving from sketch/concept to modelled form. Neural CAD is intended to smooth that jump.
- Multi-modal input: Neural CAD supports prompts via language, sketching, or image references — making the interface more flexible and human-centric.
- Editable generative output: Unlike many AI tools that output static geometry, neural CAD’s outputs remain part of the modelling domain — editable, parametric, and connected.
- Contextual reasoning: Because the model is trained on architectural and industrial systems and geometry, it can propose solutions that make sense not only geometrically but in building logic (e.g. adjacency, circulation, structural logic).
- Productivity gains: Autodesk claims that neural CAD could automate 80–90% of what designers currently do as manual or assistant-level geometry manipulation.
Challenges & Risks Ahead
- Model robustness & trust: Generative models must reliably propose valid geometry and design logic. Designers will need confidence that outputs aren’t arbitrary or error-prone.
- Domain specificity: Architectural and construction rules differ globally (codes, climate, regulations). Training a neural CAD that is useful in Australia may require local data tuning or constraints.
- Interpretability & control: Designers may want explicit control over constraints (e.g. structural spans, building regulations). Ensuring that designers can override or guide the neural model is critical.
- Computational demands: Real-time generation and editing with neural models may require significant compute (likely cloud GPU) — raising questions of performance, latency, and cost.
- Change management: Integrating generative AI into existing design workflows (especially in firms used to Revit-centric or parametric workflows) will require cultural and procedural adjustments.
What This Means for Firms in Australia & APAC
- Early exploration & experimentation: Now is a good time for forward-looking firms to get on the Forma Building Design beta waitlist (once available), so they can test workflows, integrations, and local applicability.
- Pilot local projects: Try small or schematic-phase projects in the new tool to test how it handles local climate (e.g. solar, daylight) and local regulatory constraints.
- Build internal AI & data capacity: Firms should begin thinking about how their internal project datasets (past BIMs, standards, constraints) could feed or customize neural CAD models for local use.
- Advocate for local standards: As AI-driven tools become more integrated, local AEC standards bodies should engage to ensure models respect Australian building codes, fire safety, accessibility, etc.
- Train for hybrid workflows: Until the new tools mature, expect hybrid workflows (some work done in Forma Building Design, some in Revit or specialist tools). Teams will need cross-tool fluency.
- Monitor licensing & usage costs: Keep an eye on cloud usage, quotas, and how Autodesk structures pricing for AI/compute usage in the Forma cloud.
For further information, be sure to check out the following:
Autodesk Blog – https://adsknews.autodesk.com/en/news/upcoming-3d-generative-ai-foundation-models/
AEC Magazine – https://aecmag.com/ai/autodesk-unleashes-neural-cad/
Engineering.com – https://www.engineering.com/autodesk-introduces-neural-cad-at-au-2025/
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