Are they necessary (linear exposure / fstop).
It's a bit confusing. Let's say i use f22 and shutter length 1/8 of a second. Then i would also insert same settings to Lux GUI linear exposure/fstop fields.
But this would heavily underexpose film that allready is defined with optimal shutterclose, lensradius and iso.
"float shutterclose" [0.125000000000000]
"float lensradius" [0.001136363636364]
"float linear_exposure" [1.000000000000000]
"float linear_fstop" [1.000000000000000]
Also we need refresh/update render image button because when i render i usually update every after 0,5-2 hours by offbalancing light gain and balancing it back (so i update 2 times just in few seconds, not sure how safe it is because sometimes there comes a lot of *MLT noise i think* with 2'nt refresh on strong SSS volumes).