In Forest Pack 6 we added green wall presets to the free built in library. In this tutorial we'll demonstrate how are used. There are two approaches to creating vertical scatters. First of all, for simple planar or mostly planar areas you can simply rotate the Forest object to align with the wall. Alternatively, for more complex surfaces, you can use UV mode to scatter on any arbitrary shape. The built-in library includes both types, and are identified using either an XY or a UV label in the preset's name.
Let's start by taking a look at how to scatter of vertical planar areas, which has the advantage of retaining all of Forest Features including edge mode, spline painting and more.
When using surfaces there's an added consideration. Forest Pack expects the local Z axis of both the surface and Forest Pack's local Z axis to be aligned. Any deviation from this and you'll start to encounter issues. This means that the Z axis will need to be perpendicular to the surface on which you want the green wall.
Just because the axes must be aligned does not mean that the geometry itself must be perfectly flat, it can of course bend and undulate. But the axes must remain aligned even if the geometry itself is not. The surface's normals should also face towards the Forest object or they'll be ignored. If a surface's normals face away from the Forest object, you'll need to use a UV preset instead,
If a wall is substantially deformed or faces in multiple directions you may need to use a different approach that scatters objects using the surface's UV channel. In this technique the axes alignment of the Forest Object and the surface are not important. You will need to ensure however that the surface is correctly UVW mapped in order to use these presets.
For a some of the presets you'll also notice that there are other types in addition to XY and UV called Clusters and Diversity Map. These labels tell you the way the planting patterns are created. In the clusters presets the plants are grouped together using Forest Pack's automatic clustering features.
For a more manual approach, Diversity Map presets use a coloured bitmap to create planting patterns. These maps use the colours shown in the geometry rollout and they can be easily swapped to create your own custom patterns.
Of course, this is not only true of our built-in presets, these guidelines are helpful whenever you need to create a scatter at an unusual angle. For a more in depth tutorial on creating your own vertical styles, check out our green walls tutorial.