OTOY Forums

Damn, it isn´t so simple to include strand motion blur.

Thought i can use the strand velocity, but it´s only a copy from the point from which the strand is generated.
Means, each strand point will have the same velocity. So i think i have to calculate the velocity by myself over the strand positions on different frames.

I hope that my thoughts are right and it will also work if a strand is growing and the strand point count will change over time...

Done.
But it isn´t perfect. It´s an Octane problem.
Each strand segment is a single open ended cylinder, so you must also subdivide a deformed strand much more than a strand which has no deform.
This will work for non motion blur strands, but it wouldn work with motion blur, you will ever see some segments.

So my conclusion is, motion blur for strands works, but i wouldn´t use it.

face

Object layer map with strands.
Will now update the VDB section to work with the new pointcloud structure...

I remember I had to compute and set "StrandVelocity" myself to get some motion blur in other renderers. That would be ok too (maybe even better because it's more controllable for the user).

Overall I think strand motion blur isn't super important as long as motion blur on the whole point cloud object with strands works ok.

An overview of the next version:

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Version 3.00 RC3:
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Fixed:

* The gradient node wasn´t deleted if a material was deleted.
* The PointCloud kinematics node wasn´t deleted if a regular Pointcloud contains no data.

Added:

* Added support for particle motionblur, deformed motion blur from the mesh property must be set to true.
* Added support for strand motionblur, deformed motion blur from the mesh property must be set to true.
* Pointcloud possibility to mix internal shapes with external instance shapes
* Pointcloud internal shapes can have an object layer, instance shapes will use the instance object layer.
* Pointclouds can be used as instance shapes.
* Pointclouds with animated kinematics can be rendered with motion blur.
* Parts of the strand generation will be generated in multithreaded if the count of strands is greater than 10000.

Changed:

* Redesigned PointCloud class.