Howler 9.5 will allow the creation of erosion masks that you can export, or use inside the program.

Ambient occlusion and slope shading filters

3D Designer love

Additive and multiply mode screen space ambient occlusion is now going into the 3D designer as of yesterday.  You can also add ambient occlusion directly to your texture with a new filter.

3D Designer is also getting a full floating point pipeline.  That allows for more intuitive lighting, brighter specular highlights.  And it's just better.