Generating Buildings

UNIGINE provides a set of built-in materials for generated buildings: they are inherited from mesh_base and named according to the rules. You can also create your custom textures and set up materials. However, your textures should meet a set of requirements described below.

There are four types of textures that should be prepared for a building: a texture for the basement, a texture for the wall with openings (doors and windows), a texture for the solid wall, and a texture for the roof. The UV map of each part of the building depends on the size of the wall segment that is shown on the texture.

• For Underground Pedestal and Pedestal, a single texture for a wall is applied. The texture height should correspond to the height of all these parts (in sum).

  

  Texture for Underground Pedestal and Pedestal (Basement)

• For the ground floor, an individual texture is applied. The texture height should correspond to the ground floor height.

  Texture with openings for Ground Floor	Solid texture for Ground Floor

• For Upper Floors, a single texture for a wall with openings is applied. The texture height is usually multiple of the floor height. It can be multiple of the two, three, etc. floors height, however, it shouldn't exceed the height of the Upper Floors part.

  Texture with openings for Upper Floors	Solid texture for Upper Floors

• If the wall width is less than the floor height, a segment of the texture with openings does not fit into this space properly, and the texture for a solid wall is applied.
• If the wall width is more than the floor height, the wall surface is split into two parts:
  • The first part is tiled with a texture with openings. Its width is multiple of the floor height.
  • The second part, where the texture with openings does not fit, is tiled with the solid texture.

  For example, we have a two-storey building with the floor height of 3 meters. The sufrace of the second floor wall is 10.5 meters wide and is divided as follows:

  

  The texture for a wall with openings is applied to each 3*3 m segment (based on the floor height value). For the rest of the wall, the solid texture is applied.

• For Roof, two textures should be applied: the base and detail albedo textures. Using the detail texture allows you to diversify colors of roofs with the same material: set up details rendering (blending, masking, UV mapping, shading parameters of the texture) for the Roof material to achieve the required result.

  Base albedo texture	Detail albedo texture

For materials to be correctly applied by Sandworm to the generated buildings, follow these rules:

• Each building category should have a separate base material inherited from mesh_base. This material is used as the material for the Ground Floor wall with doors and windows.
  Notice

  For this material, a texture depicting the Ground Floor should be used.
  The other materials applied to different parts of the same building are inherited from this one. The base material can have any desired name.
  Notice

  When specifying parameters of the buildings, only the base material is specified: its child materials are loaded automatically.
• Materials for the other parts of the building should be inherited from the parent material described in the previous paragraph and use the following name postfixes:
  • _basement — a material for Pedestal and Underground Pedestal.
  • _level_1_blank — a material for Ground Floor wall without doors and windows.
  • _level_2_complex — materials for Upper Floors walls with doors and windows.
  • _level_2_blank — materials for Upper Floors walls without doors and windows.
  • _roof — a material for Roof.

For example, if you have 2 types of buildings that should have different materials, set up the following hierarchy: