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I hope you are all safe and well.

Is motion blur possible on Alembic files in any version of Octane Blender?

Thanks.

Whispermode wrote:I hope you are all safe and well.

Is motion blur possible on Alembic files in any version of Octane Blender?

Thanks.

Octane can render motion blur in Blender, sure.

linograndiotoy wrote:

Whispermode wrote:I hope you are all safe and well.

Is motion blur possible on Alembic files in any version of Octane Blender?

Thanks.

Octane can render motion blur in Blender, sure.

Hi Lino - how so? I'm unable to make it work on alembics (specifically) with the internal motion blur - it either crashes or just doesn't do anything...

Are you talking about subframe motion blur (...that takes 5 times longer to render)?

Thanks.

...I've just realised:

motion blur doesn't work when the number of vertices in the mesh changes over time. So, a fluid simulation for example, imported as an alembic.

Can you confirm that's the case, and if there's a solution or fix (on the horizon)?

Thanks.

Whispermode wrote:...I've just realised:

motion blur doesn't work when the number of vertices in the mesh changes over time. So, a fluid simulation for example, imported as an alembic.

Can you confirm that's the case, and if there's a solution or fix (on the horizon)?

Thanks.

If there are motion vector information stored for each object in the sequence, Octane can render it.
I'm afraid we have some kind of limitation in the current Blender version, since FLIP Fluids option that allowed to store motion vectors in the simulation is not there anymore (the developers said that's because of a Blender limitation).

linograndiotoy wrote:I'm afraid we have some kind of limitation in the current Blender version, since FLIP Fluids option that allowed to store motion vectors in the simulation is not there anymore (the developers said that's because of a Blender limitation).

Does this limitation also exist in Blender's internal new Mantaflow fluids?

pegot wrote:

linograndiotoy wrote:I'm afraid we have some kind of limitation in the current Blender version, since FLIP Fluids option that allowed to store motion vectors in the simulation is not there anymore (the developers said that's because of a Blender limitation).

Does this limitation also exist in Blender's internal new Mantaflow fluids?

Mantaflow offers the Use Speed Vectors option for that.

Right now Octane is not using the provided motion vector information properly. We'll look into that.

linograndiotoy wrote:

Whispermode wrote:...I've just realised:

motion blur doesn't work when the number of vertices in the mesh changes over time. So, a fluid simulation for example, imported as an alembic.

Can you confirm that's the case, and if there's a solution or fix (on the horizon)?

Thanks.

If there are motion vector information stored for each object in the sequence, Octane can render it.
I'm afraid we have some kind of limitation in the current Blender version, since FLIP Fluids option that allowed to store motion vectors in the simulation is not there anymore (the developers said that's because of a Blender limitation).

So on this, Lino - are motion vectors data within the mesh itself, or render pass/texture level?

Thanks.

Motion Vectors are stored in the mesh.

Could we get a tutorial on this. I'm also having issues getting the baked motion vector data to work with Octane in Maya/Standalone.