Applies face tessellation to the current selection level. If no sub-object selection has been passed up the Stack, then the entire object is tessellated. This modifier provides the following additions to the tessellation available in an editable mesh:
Operate On: Choose one of these two button to specify whether the tessellation is performed on the triangular faces, or on the polygonal facets (the areas bound by visible edges)
Edge: Selecting this divides the face or polygon from the center to the middle of each edge. when applied to a triangular face, it also divides unselected faces that share edges with the selected faces.
Face-Center: Select this to divide the face from the center to the vertex corners.
Tension: Determines if the new faces are flat, concave, or convex after Edge tessellation. A positive value rounds faces by pushing vertices outward. A negative value creates concave faces by pulling vertices inward. A setting of 0 keeps the faces flat. Also works with the Edge/Polygon method. Default=25.
Iterations: Each option button specifies how many times the tessellation is applied. For example, setting Iterations to 2 would be similar to clicking the Tessellation button twice in an editable meshexcept that you can easily back out at any time while using the Tessellate modifier. If you want more than four iterations, apply another Tessellate modifier.
Caution: UVW mapping that exists in the Stack before the Tessellate modifier is retained. However, in some cases, the mapping might be altered, depending on the type of mapping and the tessellation settings. Typically, this happens when the applied mapping uses extreme compound angles.