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Mention assimp support in README.md

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Matt Pharr 2021-01-21 06:16:40 -08:00
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README.md
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@ -158,6 +158,23 @@ equi-area mapping); you can upgrade environment maps using
$ imgtool makeenv old.exr --outfile new.exr
```
Converting scenes to pbrt's file format
---------------------------------------
The best option for importing scenes to pbrt is to use
[assimp](https://www.assimp.org/), which as of January 21, 2021 includes
support for exporting to pbrt-v4's file format:
```bash
$ assimp export scene.fbx scene.pbrt
```
While the converter tries to convert materials to pbrt's material model,
some manual tweaking may be necessary after export. Furthermore, area
light sources are not always successfully detected; manual intervention may
be required for them as well. Use of pbrt's built-in support for
converting meshes to use the binary PLY format is also recommended after
conversion. (`pbrt --toply scene.pbrt > newscene.pbrt`).
Using pbrt on the GPU
---------------------