Cpu Use

[Alexis]

Hello,

In all render mod (raytracing, path tracing ect...), Kray use only 40% cpu power, with lightwave render, 85% of cpu power.
Why?? I don't no.

You have an idea ?

[Janusz Biela]

I posted it to G.
Sometimes I see issue with CPU idle in some scenes. Sometimes it is random (this is the worst situation).

[Alexis]

Thanks Januz,

I test the same scene in other computer and render is ok...
I have lemmings in my laptop !

[Alexis]

After uninstall lightwave, It' s ok....

I like my laptop..

[Janusz Biela]

After uninstall lightwave, It' s ok....

I like my laptop..

...I would not be that sure I suspect problem with new LW (11.6.x) or Kray for LW 11.6.x. No answer from G. yet.

[Alexis]

...I would not be that sure I suspect problem with new LW (11.6.x) or Kray for LW 11.6.x. No answer from G. yet.

I use LW 11.0.1 with kray 2.5 buil 1223. Problem is not LW 11.6

[Janusz Biela]

Please clarify: you have problem with 2.5 still, even with older Lightwave?

[Alexis]

Yes, I use LW 11.0.1 and kray 2.55 on windows seven.

I think the problem is not LW or Kray. After uninstall and install, it's ok... Why? i do't know.

[Janusz Biela]

I got info from G.: it can be situation when user switch to 3 passes or more and Kray Engine try find new GI samples. Because amount of new not discovered samples is very small it can be kind of conflict in threats when one threat calculate and another one must wait or can not find new. But I am not sure is that. But partly I confirm this situation when I started use 3 passes.

[Alexis]

Hello,

New Computer and still the same problem , and always when I do not have time to take care of it...

Only 12%-8% use my xeon... and 2h time remaining since 5h.

I can't use LW 2015.1 with tue bug of kray 2.57...

[Janusz Biela]

Again: do not use last K2.x for LW2015. It will be soon update. Please make copy of this scene and keep it. When update will be available for LW2015 you will check again this issue. From my side I can advice you to use another Pixel Order: RANDOM I use only this (not SCANLINE). Also you can use this command in Kray:

Code: Select all

lwo2rayslimit 1,0.9;

In fact this is special command for carpaint Node to prevent deep recursion problem (sometimes render engine stuck with calculations in reflection surfaces and also BUGS from Lightwave make difficult life for Kray). I am not sure this command help with other cases then carpaint Node issue but visually I see differences in speed render.

generally if you can change this:
- RANDOM pixel order
- this command above
- only two passes for exteriors
- GI resolution minimum 600 mm
- QMC shader for leafs/grass 100/0 (with dual Xeon I use 200/0)

as you did but I do not know yours level of QMC
- do not use SunSky system from Lightwave
- if you do not like Physky Kray use HDRi + SunSpot (just blur HDRi map before or inside Lightwave to prevent bad photons issues. this blur trick you do not need use in Kray because Kray quite good deal with this common problem)

[Alexis]

Thanks Januz, with your code and Random pixel order it's ok.
I don't understand why !

You are the best

[Janusz Biela]

Thanks Januz, with your code and Random pixel order it's ok.
I don't understand why !

You are the best

Yes this pixel order (random) give the best solution:
- best GI sampling
- best speed

Anyway, I got from G. new updates for LW2015 and I will test it today in my scenes (there in LW2015 a lot changes and also some small bugs in Kray old/new, include CPU issue)...but we are really close to get stable Kray for LW2015.

The Random Pixel Order according to G. information is the best way for rendering. Give better distribution for CPU power especially dual CPU (dual xeon). It is normal/common problems for that systems (dual Xeon) and distribution of Power CPU brings all the time small problems.

[Alexis]

We are waiting forward to it ! I can finally use LW2015

And kray3? You have set a deadline?

[Janusz Biela]

We are waiting forward to it ! I can finally use LW2015

And kray3? You have set a deadline?

G. works on both now because are new functions in LW2015. Because of LW2015 the beta K3 is a bit shifted.