Ez3d has a top-down approach to 3D modeling, going from high-level "Primitive" or "Potter" objects down to "Faces". As you go from one level down to the next, you are offered more flexibility at the cost of losing the ability to edit at a higher level. Hence when an object is selected, only a certain set of tools can be applied to it (The Ez3d interface grays out those tools that cannot be applied). The following are the object types:
"Primitive": For normal modeling, you usually start with one of the "Primitives". You can choose from a simple set of primitives such as cube or cylinder.
"Potter": For modifying the basic shape, you can invoke the powerful "Potter" tool. This spline-based tool allows you to modify the profile/sections/axis spline curves of the basic object, and create a more complicated object. You will find "Potter" adequate for a majority of your basic modeling needs.
"Spline": If you want to fine tune the shape of the object, invoke "Spline Surfer". This tool allows you to directly manipulate the surface spline control points.
"Faces": The next level is "Face Builder", which allows you to directly manipulate the triangles of the object's surface. You can also invoke "Face Builder" directly, to create polygonal objects from scratch.
"3D Text": You can use the "3D Text" tool to create 3D lettering.
"2D Text": This is used to create 2D annotations located in 3D space
"Lines": This is used to create 3D lines.
"WWW Inline": For VRML users, the WWW Inline tool is a way of "auto-inlining" objects in the scene, as well as include objects from across the Web.
"Group": When you take two objects together and group them together, a parent of type "Group" is created.
"Unknown": When you read in an external file and want to leave the contents "as-is", the contents are read in as an "Unknown" object, which cannot be modeled using any tool.
