How to stop warping of edges of planes used for tileable textures?[Answered]

[system]

Im sculpting a plane using wrap mode that Im going to use to bake textures for a tileable texture. Whenever I sculpt a certain amount on the edges of the plane, it’s edges warp so that it is no longer a perfect square plane. This is a problem for framing the plane to the canvas within zbrush and scupting more/baking it to textures. It messes up the borders of the tileable texture so that it is no longer seamless within the normal map.

Is there a way to sculpt on planes so that the edges remain completely intact? Ive tried preserve edges and brushes which dont have buildup but it still messes up after a certain amount of sculpting.

[Cryrid]

Transform: Modifiers

You can have strokes only affect one axis, so as not to warp your borders.

[system]

awesome thats exactly what I was looking for but ive ran into a new problem. When I frame my perfectly created plane from either 3ds max or maya to a 1024 x 1024 document, theres a tiny sliver of about 5 pixels or so that exists at the top of the document. basically the perfect plane wont frame fully to the perfectly square document. Ive made sure the plane is exactly facing orthogonally but it still isnt perfectly lined up…