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p3taoctane wrote:I could not find this in the manual...

So I made my own manual


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Animation Mode: Full

For batch render. Export all geometry at each frame, doesn't respect Geometry Type.


Animation Mode: Camera Only

For batch render. Export all geometry once at first frame and the camera position at each frame.


Animation Mode: Movable Proxy

For batch render. Export geometry and animation as specified in the Geometry Types.

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Geometry Type: Global

All Meshes with this type are merged into one mesh, exported once.


Geometry Type: Scatter

geometry and transform is exported once (static)


Geometry Type: Movable Proxy

geometry is exported once but transform is updated at each frame (animation, rigid mesh)


Geometry Type: reshapable Proxy

Vertex position are updated each frame (vertex animation)
- if Constant Topology is on : internal motion blur is calculated when enabled.
- if Constant Topology is off : internal motion blur is NOT calculated when enabled, except if the geometry comes with motion velocity data (Motion Vector Color Set attribute)


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p3taoctane wrote: Movable Proxy
Enables you to scroll the time line and the render view window will update the movable mesh... but motion blur will not show unless you batch render.... Is that last statement correct?

No, last statement is not correct.
Motion blur is not visible in IPR if you use Subframe motion blur, only visible in batch render.
But if you use Internal motion blur, it is also visible in IPR.

All perfect help

Thanks both.

My findings lead me to ask for something that can be solved by render layers and doing four passes.... if motion blur could be assigned selectively to meshes I could do it in one.

I think it is mostly because of the physical accuracy of the camera. If the camera is moving and internal motion blur is on (I assume it is the same for subframe) then because the camera is physically accurate... stuff moving past it blurs... even if it is NOT translating.. I think this would happen with a camera because of the shutter speed etc right.

So a camera move with no motion blur or a (low shutter speed) pass rendered out achieves the same thing... but if there is something moving accross the scene at a fast rate and you want it to motion blur you need a shutter speed and hence the other stuff blurs too. So you do a pass without out and a pass with alpha blurring object and you are set... but things in the foreground and reflections etc all require multiple passes if the camera move and the blurred objects can be masked out as appropriate using ID layers.

If I could just tell all the stationary objects not to blur as the camera moves ... I'd be done...


Is that possible in a Physcial camera

Just wondering

Thanks for reading all this while you are trying to get 3.0 out

Peter

Right, obviously it's not possible to enable per object camera motion blur .

I guess your best shot here is to use Internal Motion Blur and put the camera shutter value low enough to only affect the fast moving object.