As in the previous chapter, the Houdini setup will not be discussed in detail. You can check the provided vraychapter_abc_export04_particles_Chapter04.hip file for reference, which you can download from the button below.
A few notes when exporting particles from Houdini as Alembics to be loaded through the V-Ray Proxy Import:
The equivalent of the pscale attribute is width. You can remap it in a Wrangle node with f@width = f@pscale;
The v attribute is automatically remapped and read by V-Ray when motion blur is enabled. You should be aware, however, that v is not used when the topology/point count does not change - in this case V-Ray calculates the velocity (and thus - the motion blur) based on the transformations/deformations of the points.
Anchor
1.1
1.1
All custom attributes are preserved and can be accessed through the Vertex Color Texture 1. You need to feed it to a material, apply that material to the V-Ray Proxy and press the Update button on the texture to refresh the Channel Name drop-down menu on the Vertex Color texture.
