Determines how the mesh surface triangles are derived from the set of vertices (points) represented by the `x`, `y` and `z` arrays, if the `i`, `j`, `k` arrays are not supplied. For general use of `mesh3d` it is preferred that `i`, `j`, `k` are supplied. If *-1*, Delaunay triangulation is used, which is mainly suitable if the mesh is a single, more or less layer surface that is perpendicular to `delaunayaxis`. In case the `delaunayaxis` intersects the mesh surface at more than one point it will result triangles that are very long in the dimension of `delaunayaxis`. If *>0*, the alpha-shape algorithm is used. In this case, the positive `alphahull` value signals the use of the alpha-shape algorithm, _and_ its value acts as the parameter for the mesh fitting. If *0*,  the convex-hull algorithm is used. It is suitable for convex bodies or if the intention is to enclose the `x`, `y` and `z` point set into a convex hull.

Sets the intensity values for vertices or cells as defined by `intensitymode`. It can be used for plotting fields on meshes.

Determines the source of `intensity` values.

Sets the color of each vertex Overrides *color*. While Red, green and blue colors are in the range of 0 and 255; in the case of having vertex color data in RGBA format, the alpha color should be normalized to be between 0 and 1.

Sets the color of each face Overrides *color* and *vertexcolor*.

Determines whether or not the color domain is computed with respect to the input data (here `intensity`) or the bounds set in `cmin` and `cmax`  Defaults to `false` when `cmin` and `cmax` are set by the user.

Sets the lower bound of the color domain. Value should have the same units as `intensity` and if set, `cmax` must be set as well.

Sets the upper bound of the color domain. Value should have the same units as `intensity` and if set, `cmin` must be set as well.

Sets the mid-point of the color domain by scaling `cmin` and/or `cmax` to be equidistant to this point. Value should have the same units as `intensity`. Has no effect when `cauto` is `false`.