A Guide to Adding Thickness and New Topology to Architectural Meshes in Blender

Blender’s Solidify and Remesh modifiers can be used in architectural modeling to add thickness to surfaces and create new mesh topology. Solidify gives depth to a mesh surface, while Remesh generates new topology that follows the shape of the input surface. This guide is based on the current explanations in the Blender Manual; the sources do not specify a particular Blender version for either modifier.

1. Add thickness to a single surface with Solidify

Solidify adds thickness to an existing mesh surface. It can be used to give volume to walls, panels, or shell elements modeled as single surfaces. To add the modifier to the active object, use the Add Modifier button in the Modifiers tab of the Properties Editor. According to the Blender Manual, Shift+A in the same tab is another way to add a modifier.

First, choose Mode based on the model’s geometry:

1. If the geometry has no special cases, start with Simple mode. This is the default algorithm, and the manual recommends it when there are no special cases to avoid the slowdown caused by additional logic.

2. Try Complex mode if more than two faces are connected to an edge, or if the model does not thicken properly in Simple mode. This mode supports some forms that Simple cannot handle, such as architectural wall layouts, and aims to produce manifold output.

3. In Simple mode, a boundary may not thicken if the normals of neighboring faces do not generally point in the same direction. If you encounter this issue, check the face normals before increasing the thickness value.

Thickness sets how much thickness to add. Offset positions the new geometry inside or outside the original surface. Its value can range from -1 to 1; at 0.0, the layer is centered on both sides of the original surface. The inward and outward directions depend on the face normals.

2. Check corners, openings, and scale

In Simple mode, Even Thickness can help keep thickness more consistent at sharp corners. High Quality Normals aims to calculate more even normals. The manual notes that these options can improve quality in some cases, but can also increase computation time. Neither guarantees an exact wall thickness for every mesh topology.

In Complex mode, the Thickness Mode options determine how thickness is handled. Fixed keeps points at a fixed distance from the original geometry. Even attempts to account for corners, but may not always produce the expected result where more than three faces meet. Constraints is a more advanced option that aims to keep thickness as appropriate as possible. The manual notes that it finds an optimal solution for cases with up to three faces, but emphasizes that this does not mean a perfect result is guaranteed in every situation.

Thickness is calculated relative to the object’s local vertex coordinates. If the object has non-uniform scale, thickness may vary across different sides of the model. The Blender Manual recommends using Apply or Clear on the scale to address this. Rim – Fill, which closes opening edges, creates faces between the inner and outer surfaces; disabling it when it is not needed can speed up calculations. Flat Faces in Complex mode is also slow, so it can be disabled when unnecessary.

3. Rebuild topology with Remesh

Remesh generates new mesh topology that follows the curvature of the input surface. Its basic output consists of quads, but when Adaptivity is used, areas that do not need detail are simplified, which can create triangles in those regions.

1. Blocks does not apply smoothing.

2. Smooth produces a smoother surface.

3. Sharp works similarly to Smooth while aiming to preserve sharp edges and corners.

As Sharpness increases, edges more closely resemble the input; lower values filter more of the noise in the input surface. Octree Depth determines the output resolution: lower values produce larger faces relative to the input. Lowering Scale also reduces output resolution. Adaptivity can reduce the face count by simplifying geometry where detail is unnecessary; consider the possibility of triangulation when using this option.

Thin input elements may turn into separate, small geometry pieces after Remesh. Remove Disconnected filters out small, disconnected pieces, while Threshold controls which sizes of disconnected components are removed. If the input mesh is completely flat, the Blender Manual recommends adding a Solidify Modifier before Remesh. This gives Remesh geometry with thickness to work with.

4. Manage modifier order and application

Blender evaluates modifiers from top to bottom in the stack. You can add multiple modifiers to an object, and their order affects the result. For example, switching the order of Solidify and Remesh changes which geometry Remesh operates on. Check the stack order and compare alternatives to determine which sequence produces the result you need.

Applying a modifier with Apply converts its effect into geometry and removes the modifier from the stack. The manual warns that applying a modifier that is not at the top of the stack may ignore the order and produce unintended results. Check both the result and the stack order before making permanent changes. If you need to edit the model later, leaving the modifier unapplied preserves a non-destructive workflow.

Common mistakes

• Evaluating Solidify thickness without checking for non-uniform object scale; thickness may vary in different directions.

• Assuming Simple mode will produce the same result with every topology; face count and normals matter.

• Applying Remesh directly to a completely flat mesh; the manual recommends using Solidify first.

• Assuming Remesh output will remain quads everywhere with Adaptivity enabled; simplified areas may contain triangles.

• Applying a modifier without checking the stack order; the operation is permanent, and order can affect the result.

Impact on architecture and archviz workflows

Solidify can add thickness to single-surface architectural elements, while Remesh can rebuild mesh topology when needed. They can be useful for a range of models, from flat panels to complex wall shells. However, the settings depend on the geometry: Complex mode is slower in complex cases, and Remesh resolution is controlled with Octree Depth and Scale. The source documentation does not provide specific hardware requirements or licensing terms. Checking scale, normals, disconnected pieces, and modifier order before making the result permanent can help preserve the model’s editability.