Blockout

Whiteboxing Asset Kit For Unity & accompanying tool
Website | WebGL Demo | Tutorials
Blockout is a collection of prototyping tools for Unity that speeds up the creation of level design mock-ups. Tried and tested by various industry developers, everyone who has tried it loves it.
Quick
Build combinations of simple to complex prefabs to create fluid and engaging level prototypes without the need have artistic direction in this planning stage, with very little Unity know-how required.
Expandable
Even though there is a large collection of assets already in the pack to tempt you to not leave Unity, if there is something you want to add to the system, there is a wizard in place to help you do just that.
Simple
This was built with simplicity in mind so non-artists and beginners can create their level design vision without the need for complex 3D modelling applications or the need to scour the internet to find common random models.
Main Features:
• 700+ art assets
• Polycounts ranging from 6 - 6000 verts
• Textures averaged to 1024x1024
• Theming
• World Space Tri-Planar Scalable Objects
• Transform Controls
• Grid Snapping
• Hierarchy Tools
• Prefab Picker
• Ruler
• Area & Pin Comments
• Asset Suggestions
We'll continue to update this as we get new ideas from the community and features that we find we need. Just ask!