This time ( as always ¬¬ ) i am here looking out for some interior rendering advices , something that could speed up my rendering times.
It is a simple modern kitchen with 7 light layers ( includes Sun and Sky and 1 general light layer as roof spotlights ).
I have lots of doubts when is all about interiors...Like how to choose the right rendering methood, there are so many things to keep in mind... materials, modeling , light layers ,clamp contributions (use it or no to use it ? ), exit portals, cpu, gpu , (or both) light sources ...Etc, etc. I am not complaining , this is just a bit messy to me.
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I tried to use Exit Portals with CPU+GPU , but they are not compatible ....is that right? .
Also tried to use BIDEIRECTIONAL MLT with CPU+GPU and did't work either, indigo change it to PATH TRACING ¬¬.
I guess Light Layers doesn't work if i enable GPU ACCELERATION ,shame cuz it was when everythings goes faster...or am i doing something wrong ?
If i enable the Foreground Alfa and CPU+GPU nothing shows up...is that normal?
These are the things that make me feel confused and so is why i am here... i attach images of my project to see if please you can give me some advices
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Thank you in advance
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I am using the latest Indigo Version and so is the same with Skiindigo
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Win7 64
Intel i7 5960X 4.2 Ghz
Nvidia Titan X 12GB
These are the things that make me feel confused and so is why i am here... i attach images of my project to see if please you can give me some advices

Thank you in advance