GI pass issue with thinkbox Deadline

[funonfun]

Hello ChaosGroup

we got a GI pass issue with thinkbox Deadline

This is incorrect GI pass img



we often use Tiles Render with Deadline

like this


we submit Render job to deadline

when deadline start rendering it render speed is very very very slow

we compare with local render GI pass



we are not so sure issue come form Vray or Deadline

the issue File has already sent

[tashko.zashev]

the issue File has already sent

Thank you, we will check the ticket now and reply to you as soon as possible.

[funonfun]

thank your reply

we checked the ticket

it is the "Deadline's tile rendering" without any V-Ray Distributed rendering

[funonfun]

we use simply test and clarify what happen with deadline

override scene with simply mat

like this:


we test two difference GI method

First one is Brute Force and Light cache

other one is Irradiance map and Light cache

BF+LC
it seems like some slaves get stuck in Prepraring scene stage
other slaves is rendering with slow speed


here are local slave status

other one
Irradiance + LC
it get suck in final bucket


here are local slave status


hope help anything

[tashko.zashev]

Thank you for your details.
We are doing some tests now and will reply to the ticket as soon as we have any information about this issue.

[funonfun]

hello

we have tested same issue for a while

we notice one thing about this issue

difference GI turn on or off

GI turn off with local render



GI turn off with Slave render



both of render time are very close (the test look like work fine with deadline)

so we guess GI turn on could be cause some bug or something

hope help anything

[Svetlozar Draganov]

Hello again,

Have you received our last reply from the ticket system?
The slow down appears because Deadline calculates Light Cache for the entire image for each tile. So if you have for example 60 tiles Deadline will force Vray to calculate 60 times Light Cache not only for the current tile but for the whole image. In order to avoid that please pre-calculate LC before submitting the scene to the Deadline and load it from file. With that setup the slowdown wouldn't appear.
The latest versions of Deadline already has a support for Vray Distributed Rendering - this would be even better solution than Tiled-Rendering , have you tried it ?