Our small group of designers has petitioned to bring back the old style Obj Info Mapping Preview. The VW / RW Movie of the 2010 (Planar Only) Texture adjustments with the Attribute Mapping Tool reminds me of a Wow -it great! got to have it Kids Toy / TV advert at Christmas time. Then you get the toy out of the box ...
Textures, like brickwork on a wall, that repeat and can have variation to their start / stop locations hide a multitude of sins. In the case of Textures that need to be accurate it is NOT how the texture is applied that counts, it is how you draw the shape in the first place.
Here are a few suggestion to try. Work out side of VW / RW to make the Shaders similar in size / ratio if it is to be an Image based Texture (Photoshop etc).
Apply Textures to objects that have been drawn in 2D then converted to 3D Polygons (From the Modify Menu) More predictable than with an extrudes.
If the object is essentially flat (ie: painting on a wall. Draw it flat.)
With the Attribute Mapping Tool ...
Start in Wireframe mode, when selecting the Attribute Mapping Tool.
DO NOT have a texture that is larger than the object it is applied to.
DO NOT have an object that is "remote" from the origin of the drawing.
DO NOT have an object that is other than "flat on the ground plane"
In each of these cases, the Attribute Mapping Tool will lose the texture "out in space somewhere" and one needs to zoom out / and or change to another view to see "where the texture went" or where the texture "handles went".
Start in Wireframe mode, when selecting the Attribute Mapping Tool
Suggestions:
Create the object to be textured at (0,0) (Move it afterwords to a desired place)
Work in Top Plan and apply the texture at (0,0) (Rotate afterwords if needed)
Make the object a Group, then edit "the Group" without other object being visible. Adjust the Texture while in this Edit Group Mode. (Only one thing to work on / worry about) Could also be a separate layer or even a separate drawing.
As an alternate:
DO NOT use the Scale slider in the Obj Info Palette. Change the Texture Size
Think numerically and adjust the Delta X and Y in the Obj Info Palette ... This can be a "Form-Z" style pain - yet it is often easier than the Attribute Mapping Tool if you know what the Texture size and the object size are.
Adjust the object to match the texture. ie: resize a 3D Polygon in Open GL rendering ( ... or set the texture size to the desired shape dimension)
Peter