Streight edges on Sculpts

Hello all I use 3dsmax and I work from a cylinder to obtain mostly what I want , now I am concerned about making steps and I want them to look very streight but my problem is that even after exporting increasing localized parts contrast in the texture or uploading it without compression I always loose the flatness of the surface I want or the linees look a bit deformed , is there any other way to solve this?

thanks for any answer....

Check out Cel Edman's program called SculptyPaint. It makes very precise stairs, and all sort of other great sculpty shapes.

http://www.xs4all.nl/~elout/sculptpaint/

There is also a tutorial on YouTube about making staris from Scultpies. (Daniel Abernathy, I think.)

The basic theoretical trick is that for a sharp edge you have to collapse two or three edges together into one.

What you mean by collapse? I use 3dsmax....

sculpt-Planes are 33 vertexes high and 32 vertexes wide.
All other sculpt-types are 32x32 vertexes (lowest line is ignored to save some cycles), with the sphere getting top and bottom converged to one point single point.
Colinear polygons are skipped by the renderer and not klickable (if 2 certexes are at the same place, you get colinear polygons, also are half of all triangles at the poles of a sphere.
each vertex can be on position [0, 1, ... ,255] for relative x y and z position (127=Prim center), and that can be scaled relatively like all prims from 0.01 to 10,0 (and huge prims, that are almost always cubes, and you can not slice sculpted prims like huge prims are sliced).
Polygon-triangle-diagonals go from bottom left to top right vertexes on the UV-map (important for smoothing and texturing).

floats get rounded, poorly, that causes inaccuracies on almost all shapes.
Downsampling can also kill a lot of accuracy.
You also need lossless image uploading, this was buggy in client-display early, and buggy sometimes in the uploading process.

But How I collapse vertexes? U mean weld them into max? or just make them occupy the same place??

Occupy the same location.