LOD Levels in Practice: What Level of Detail Do You Need for Your 3D Model?

When an industrial facility 3D modeling project kicks off, one of the first questions is: how detailed does the model need to be? The question sounds simple, but the answer directly affects project costs, schedule, and whether the end result is actually usable. LOD levels — Level of Detail levels — are a systematic way to describe the granularity of a model. Choosing the right level is one of the most important decisions before a single scan has been taken.

This article covers what LOD levels mean in practice in industrial environments, how the intended use guides the choice, and when a point cloud alone is sufficient without separate modeling.

LOD levels in industry – where the differences come from

An LOD level describes how detailed the objects in a model are. It does not describe measurement accuracy as such, but rather how much geometric and structural information the model contains. Measurement accuracy is described separately by the LOA classification (Level of Accuracy), and it is important to keep these two distinct.

Four levels are most commonly used in industrial 3D modeling. LOD 100 describes masses and general geometry, making it suitable for site planning. LOD 200 includes objects with approximate size, shape, and location, which is sufficient for layout planning and general visualization. LOD 300 provides precise geometry and location, making the model suitable for actual design work. LOD 350 adds connections and interfaces to other systems, making it the right level for designing pipe and equipment connections as well as clash detection.

It is worth noting that in the BIM world, LOD often refers to Level of Development levels (100–500), which describe the model’s stage of development and reliability. In laser scanning and industrial 3D documentation, the concept refers to the level of detail. When ordering a modeling service, it is advisable to confirm that both parties are talking about the same thing.

Intended use determines the required level of detail

The right LOD level is not the highest possible, but the one that serves the project’s actual needs. An oversized level of detail increases costs and extends delivery time without a corresponding benefit.

If the goal is general planning of a plant area or evaluating the location of a new unit, LOD 100 or 200 is sufficient. When planning an equipment change or a new installation in an existing process unit, LOD 300 is generally needed. When designing pipe connections, support structures, or tight maintenance routes, LOD 350 is justified because connection data is critical for clash detection.

The most practical way to approach the choice is to ask: who will use the model and for what purpose? A process engineer needs different things than a maintenance manager or a procurement department. Whether the model will be integrated into existing design software such as AVEVA E3D also affects what level the data needs to be delivered at.

When laser scanning data replaces traditional modeling

In some situations, a separate 3D model is not needed at all. The point cloud produced by laser scanning can in itself be sufficient for many purposes, and it is considerably faster and more affordable to deliver than a fully modeled 3D environment.

A point cloud is often sufficient for remote verification of critical dimensions, documentation of existing structures, or capturing the baseline condition before a shutdown. When measurements need to be taken after the fact or visual inspection is needed without actual design work, a point cloud is an efficient solution. Modeling comes into play when data needs to be imported into design software, clash detection needs to be performed, or information needs to be shared more broadly across the organization without specialized software.

Mobile laser scanning covers up to 20,000 square meters per day and is well suited to large industrial areas where LOD 200 accuracy is sufficient. Fixed laser scanning can reach LOD 350 with millimeter-level measurement accuracy, but it is slower and best suited to areas where connection-level data is essential. Hybrid scanning makes it possible to combine these approaches: the most precise method is directed only to the areas that require it.

The choice of accuracy level affects project costs and schedule

LOD level is one of the key factors affecting pricing. The higher the level, the more modeling work is required, and this is reflected in both price and delivery time. This does not mean that the highest level is always a poor choice, but it must be justified.

In a large investment project involving hundreds or thousands of scanning positions, limiting the modeling scope to the right level can save significant time without compromising project quality. Data processed in process units can typically be delivered within one to four weeks after fieldwork, when the scope has been clearly agreed upon in advance.

Cost should always be compared against alternative expenditures: repeat measurements, site visits, installation errors, and downtime. Reusable as-built data can serve multiple subsequent projects without new scanning, spreading the initial investment over a longer period. Tolerances and the scope of modeling should be agreed upon and recorded in the modeling report before work begins, to avoid any ambiguity about what has been ordered.

Choosing the LOD level as part of the Reality Twin framework

Choosing an LOD level does not end when the model has been delivered. In industrial facilities, data is constantly evolving: equipment is replaced, pipework is modified, and new installations are made. This is one reason why Reality Twin is built on genuine reality capture data rather than on design assumptions.

Reality Twin brings together scan data, 3D models, documents, and operational data into a single view for the entire lifecycle of a facility. It works alongside existing systems such as SAP or IBM Maximo by reading their data based on location. This means that the choice of LOD level also affects how richly facility information is available to everyone who needs it.

Based on a user survey conducted by SolidComp in May 2026, Reality Twin is already clearly in use in real working situations. Of the users who responded to the survey, 22 out of 32 reported that Reality Twin reduces the need to visit the site physically often or very often. In addition, 25 respondents mentioned time savings as a concrete benefit: of those who were able to estimate the savings, the majority estimated it to be at least 15 minutes per use, and some even 30–60 minutes or more. In practice, this means that a correctly chosen LOD level and the digital twin supporting it can together significantly reduce unnecessary inspection visits and speed up planning.

According to the survey, the most important use case for Reality Twin at present is planning projects, investments, layouts, and modifications, as well as reviewing the current state of the facility. These are precisely the situations where the choice of LOD level is most critical: a model that is too coarse does not support planning decisions, but a model that is unnecessarily detailed ties up resources without added benefit. Users also highlighted document management integration as the most desired new feature in the survey, indicating that the value of as-built data increases significantly when it is directly linked to equipment-related documents and functional location data.

When the LOD level is chosen as part of a broader digitalization plan, it is worth thinking in advance about where the data will ultimately be used. A one-off design project and ongoing maintenance use place different requirements on the data. SolidComp recommends the right combination of methods and accuracy level based on the objective, accuracy requirements, and budget, so the customer does not have to resolve this alone. More information can be found in the laser scanning project procurement guide or the cost estimation calculator.