Photogrammetry in SpeedTree
The techniques in this section describe how to use SpeedTree to combine scanned models using a mixture of hand editing and procedural methods to build larger models. For example, you can mix a scanned trunk, procedural branches, scanned twigs, and photo-scanned leaf maps to produce a complete tree model.
Workflows
The photogrammetry tools allow you to build from a wide variety of scenarios. These pages provide an overview of each workflow based on outcome:
| Outcome | Workflow |
|---|---|
| Blend a photogrammetry trunk to a SpeedTree trunk from the "top" or open end of the mesh | Extending a photogrammetry trunk using a bake stitch |
| Extending a photogrammetry trunk using a band stitch | |
| Extending a photogrammetry trunk using a wrap stitch | |
| Blend a scanned branch or twig to a scanned trunk | Setting up a scanned branch or twig mesh for use |
| Placing children off of meshes accurately by hand | |
| Convert a photogrammetry mesh to a SpeedTree branch | Mesh Converter Generator |
| Create textures from scanned trunks | Create textures with the Mesh converter |
Photogrammetry generators
The generators in this group provide the mechanism for using scanned 3D assets as part of the model.
| Icon | Description |
|---|---|
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Mesh generator The Mesh generator allows imported mesh assets to be used as part of the model and operated on by the photogrammetry tools. |
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Mesh converter generator The Mesh converter generator provides a set of tools for creating tiling map sets and native SpeedTree geometry extensions on meshes. |
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Mesh detail generator The Mesh detail generator creates surface details from a material and a 3D mesh and blends those details into the parent. |
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Stitch generator The Stitch generator joins native SpeedTree geometry to meshes. |
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Target generator Target generators are used to precisely locate children off any parent. |