PrototypeKIT
PrototypeKIT gives you lot of tool for begin your dream game with prototyping. It contain many props for make your maps greyboxes phase. It also contain an advanced prototyping material, it gives you a AAA accuracy for your props placement. This material is world grid centered, this means that your material is always aligned with all map props. So it gives you the tools for make balanced maps with accuracy. My assets also come with the Customer Help Discord Server where i'm fully available to answer your questions.
Links :
Features:
18 Static Meshes for prototyping
1 fully customizable Prototyping Material
1 Light Material
2 Material Instances
3 Textures
1 showcase map
1 FPS Map
Number of Unique Meshes : 18
Collision : Yes
Number of Materials and Material Instances : 2 Materials and 2 Material Instances
Number of Textures : 3
Supported Development Platforms :
Windows: Yes
Mac: Yes