The quality of simulation results is highly correlated to the quality of the provided 3D stratigraphy or section data. Ensuring that the models are topologically and geometrically consistent and correct allows Slope Optimiser to make more accurate estimations during simulation.

When exporting 3D meshes or model surfaces from Leapfrog, always use Polyfaces by selecting:

This option exports geometry as a connected polyface mesh, preserving mesh connectivity and providing the most reliable results for downstream processing and cross-section generation. Using polyfaces minimises the need for post-processing and is the recommended export method.

DXF files exported using 3D Faces via:

are currently supported. However, this export method represents geometry as individual, unconnected faces, which requires additional processing before the data can be reliably used for cross-section generation.

Due to additional processing overhead and cleaner geometry requirements, exporting DXF files as Polyfaces is strongly recommended whenever possible.

The following tips and examples can be used to prepare high-quality 3D DXF models for cross-section generation.

Gaps between boundaries that are intended to connect can create holes or discontinuities. These issues can compromise the structural consistency and visual coherence of the model. Proper modelling practices, verification, and quality-control tools help maintain robust, gap-free meshes.

The example above shows an open solid, which should be fixed to avoid disruptions and open wires when generating sections.

Precision settings should be selected according to the complexity and size of the model. Highly complex models should either be simplified, for example by reducing the mesh, or sections should be imported directly into the project.

Use simplifications where possible without compromising the required geological or engineering detail.

Good quality section wires are essential inputs for simulations. Section wires can either be imported directly from external software or generated using the in-house slicing tool. A thorough visual inspection of selected section wires or surfaces is important before proceeding with more complex and time-intensive simulations.

Small voids may be acceptable, but large voids create undefined space between layers. Undefined regions cannot be assigned to a specific material during the simulation and can affect the final result.

The example above shows missing layers, which introduce incomplete section regions by creating voids.

The example above shows layer overlapping introduced due to coarse-grained mesh precision.

When generating cross-sections using tools such as Leapfrog, AutoCAD, Rhino, or other reputable CAD software, the likelihood of poor-quality sections is reduced if the 3D model itself follows high quality standards.

The reliability of imported sections depends on the initial 3D model quality. A well-constructed model with properly aligned vertices, closed and manifold surfaces, and consistent geometry helps avoid gaps, overlaps, and distorted profiles in generated sections.

Use layers and set their names when generating DXF files to separate different model components or regions. This makes it easier to control visibility and extract sections accurately.

Name layers descriptively to make model elements easier to manage during cross-section extraction.

• Quick Start — shortest route through the first simulation workflow.
• Troubleshooting — common geometry, OSA search region, simulation, and export checks.
• Glossary — definitions of common OptimalSlope terms.