Backburner strip rendering

[gfree]

Hi guys,

When rendering a 4000 px image in strips, with the backburner rendering system, the final image comes out with these lines (crop):



I rendered the image in 120 strips, but is seems like every strip has different shadows.

I am using the irradiance map with QMC.

settings for irr map are:

min: -5
max: -2
ctrl: 0.4
nm: 0.3
dist: 0.2
blur: 0.0
HSph sub: 40
interp :20


settings for QMC are:

0.85
0.003
min samples: 5
global subdivs mp: 4.0

Which setting can i change to prevent this?

Thanks in advance!

[mike.edel]

i think i read somewhere that you have to use a larger overlap between the strips to prevent this
is the irrmap precalculated? i guess since it has a random sample distribution it might calculate different on each machine so low values (aka more noise) will tend to produce visible difference between the strips

[jonnybefree]

or try to switch to LC, and precalculate it.
did you use bucket mode?

[gfree]

Precalculating has to happen on your local machine right? I think precalculating should help, but this takes a lot of time if it has to happen on my local workstation, time i don't have.

I normally render the images overnight. I'll try to set the overlap setting higher.

[RErender]

You can send a job to a single slave for the calc, make a dummy file for the saved imap and point the strips to this then send the strips job with a dependency to the first one

[gfree]

You can send a job to a single slave for the calc, make a dummy file for the saved imap and point the strips to this then send the strips job with a dependency to the first one

Nice! i'll give that a try!