This PHP app will generate a Sculpt texture for Second Life's Sculpted Prims. Enter z-position values (blue) from 0 to 255 and the corresponding radii values (red) from 0 to 127 in the boxes below. The values are all revolved around the prim's centre to create a solid, if your solid is inside-out then you should run your points in the opposite direction.
Various options are available for resolution and format. Ideally there would be no difference between the three resolutions given below but your milage may vary. PNG image format is given as I haven't got BMP as an option yet, with a PNG you can convert it to a BMP using any image manipulation tool (such as photoshop). Doing so will give slightly greater accuracy on your values as JPEG compression seems to skew the values a little.
Texture resolution: 256 x 256 pixels 128 x 128 pixels 64 x 64 pixels (default)
Image format: JPEG (default) PNG (requires conversion to JPEG, BMP or TGA before upload to Second Life)
Invert sculpt: Invert sculpt texture (flip horizontally)