hi
I have been reading all the topics here about gi and pbr
tried jasons settings
but cant find a good way to get rid of noise in rendering a room like it is done for arch.visualization purposes
I gather from what I read this is the worst scenario
but still here are my questiones

1. env light on shelf with hdri pluged in is this new way of previous gilight?

2. gallery materials - peter asked and some people hinted that having displacement functionality in shader even if it not ticked on can have big impact on rtime

3. rat or not to rat , i have fairly low set og about 10 jpgs should this be a worry?

4. photons that jason mentiones in his settings , do they come from indirect/gi light node
if so I ahve on 11.1 build big problems if i enable disable gi light few times or jut work it stops writing photons???
i changed locations i just get console warnings unable to write pmap?

5. Is scale crucial in rendering room with outside env as my is not real life scale but much bigger

the scene in pic took about 10hrs on 24gb xeon machine win 7 in 2K
is this reasonable?

10hrs for that is not reasonable, is it possible for you to post the hip file so we can optimize it?
btw are you using portals for env light?

cant post hip
as it is not mine, it is clients
in fact i cant even post this pic
i had portals setup
but cant see big a diference
i switched all displ off and reflect objects when not necessary