motion blur on particle

[pashunya]

Hi all
I have a simple butterfly animation with bend deformers applied to wings.
I generate particles with x particles generator and want them to render with motion blur in octane.
Single frame renders fine both in octane window and picture viewer. But as soon as I render sequence it renders erratically.
Without motion blur sequence renders fine.
I tried motion blur on simple form of animated cone and it renders fine - something is wrong with my butterfly cannot figure what ))
Second question - I cannot get alpha channel to work in png file. Help says select alpha channel in layerset but it doesnt work (separate b/w image for alpha works but awkward) - what is workflow?
I have attached my scene with butterfly.
Thanks in advance
Andrew

[toto79]

Works fine on my set up, what version of octane your using, I am on 3.0.6.2 and one more thing, your using
plain textures in your images you should be using the octane Image texture node.