LuxCoreRender Forums

Yes, there seems to be a little discrepancy.
Can you make a bug report on github so I don't forget?
Just include the images and the test scene.

Sharlybg wrote: Tue Feb 13, 2018 1:45 pm 10sc each render on the same cpu/ no clamp for both/ shutter at 45 for both:

The Cycles motion blur looks very wrong, are you sure it isn't using a some fake approximation ?

B.Y.O.B. wrote: Tue Feb 13, 2018 2:35 pm Yes, there seems to be a little discrepancy.
Can you make a bug report on github so I don't forget?
Just include the images and the test scene.

Done thanks you

The Cycles motion blur looks very wrong, are you sure it isn't using a some fake approximation ?

here is the cycles Motion blur panel. but don't really know how they have implemented this inside the core.
but they recently get a huge boost in DOF AND MB: here you have more info about :

https://cloud.blender.org/blog/cycles-t ... 10x-faster

Sharlybg wrote: Tue Feb 13, 2018 3:10 pm here is the cycles Motion blur panel. but don't really know how they have implemented this inside the core.

Like I said the Cycles motion blur look wrong, there is barely any highlight motion blur. Are you using a not linear shutter curve ?

Are you using a not linear shutter curve ?

no shutter curve like in the panel i've uploaded

I've maybe found a bug here : my lake shader don't want to render in viewport (giving a matrix invert error output) and appear matte at final render. Blend attached :

https://drive.google.com/open?id=1CFVz- ... rt7gN2yN25

The Z scale of object "Plane.027" is set to 0.
If you change it to 1, it exports correctly.

Not sure how we should handle cases like this.

• We could add a small epsilon to all values of the transformation matrix if determinant == 0 (when the matrix is non-invertible)
• Or we could provide a better warning/error message

The first option is more user friendly !

Well, I kind of implemented both now.
You get a warning, but the object is exported regardless.

Luxcore Vs Cycles:

Both render under 1mn. same lighting condition. you will also notice that luxcore become darker and noisy when smoke volume is rendered while the lighting stay unchanged.

smoke off :

Luxcore Cycles
smoke on :


Luxcore Luxcore BiDir
Cycles