Reducing the waiting time for the image update between scene changes?

[kosso_olli]

Hey there,
sometimes I feel like RT needs a lot of time to update the image after I made scene changes. Lets say I have the exterior parts of a car loaded in RT, the photographer sitting right next to me for lighting supervision. When I move a light around, I mostly have to wait 6 or 7 seconds before the scene is updating. That is way to long, at least in the opinion of most car photographes. Is there any way to speed up the update?

I tried to reduce the amount of polygons in the scene by isolating only the carpaint parts of the car, that speeds it up most. But it still takes to much time to be usable.

Regards

Oliver

[Alan Iglesias]

Have you tried increasing Ray Bundle and/or Rays per Pixel size?

...Although this may impact UI interactivity unless you are using a dedicated display card...

-Alan

[Dariusz Makowski (Dadal)]

Convert all to Proxy
Use 16/4 bundle/ray size.
Use EXR
It will be very fast...

[vlado]

When I move a light around, I mostly have to wait 6 or 7 seconds before the scene is updating. That is way to long, at least in the opinion of most car photographes. Is there any way to speed up the update?

Which V-Ray version are you using? I think light updates were supposed to be faster in the latest official update.

Best regards,
Vlado

[kosso_olli]

I'm on the latest version of 2.4.
Maybe there are too many polygons in the scene. The carpaint parts of a car are usually around 6 million polies.
Will try playing around with the raybundle size settings.

[Dariusz Makowski (Dadal)]

6mil is fine. I usually tun my cars at around 20 mil scenes. Also another thing try lowering resolution of car paint texture. That should help. But mostly its proxy.

[kosso_olli]

Convert all to Proxy
Use 16/4 bundle/ray size.
Use EXR
It will be very fast...

Did that, is really fast now! A completely differrent league, thanks a lot!

[kosso_olli]

Now the update when doing changes is blazing fast. But is there any way to speed up the scene preparation time? With DR in RT turned on, I have to wait 4-5mins before I can see anything. I suppose its the scene that must be sent to the slaves...

[Dariusz Makowski (Dadal)]

Didnt proxy solve the scene preparations? On my end it speed up it a lot. On another side it could be textures. Do you upse CPU or GPU ?

[kosso_olli]

I use the CPU mode, because my graphics card isn't very good. Will try the proxies next, didn't have time to test it. Would you export the whole car as proxy or individual parts?

[Dariusz Makowski (Dadal)]

Which ever way dont break materia and the rest of the scene Id go as individual.

[kosso_olli]

I tried proxies, the scene preparation is increasing...

This makes me wonder: The more slaves I add, the longer the scene preparation time gets. Shouldn't it be quite the same, no matter how many slaves I add?

[Dariusz Makowski (Dadal)]

No once u make all proxy the scene preparation should be quite instant. Same for slaves they should pick up render a lot faster.

[kosso_olli]

Hm, have to check again then. I save the whole car into one proxy which then is about 800mb. As I said, it was slower afterwards.

[Dariusz Makowski (Dadal)]

Humh interesting. Try separate proxies maybe. On my end it only speed up things but then again I have different vray version...