Learning of interior rendering

[JuhaW]

No, its correct. I wishlisted preserve exposure earlier: http://forums.chaosgroup.com/showthr...-Number)-value

[The3DNut]

Something seems messed up. I had to use an F-stop number of 0.1 and a Shutter Speed of 100,000 to get a slight DOF effect in my test scene. According to Photography & Rendering with V-Ray, the V-Ray Physical Camera should be simulating a DSLR but I don't think those numbers are even possible. Also it was taking over 30 minutes to render the same image that takes 5 seconds. I am going to render the same scene in 3ds Max with V-Ray and see if I have to use such extreme values to produce depth of field. I will let you know what I discover.

[JuhaW]

Ok, atleast your F-stop vs Shutter speed values sounds correct when you trying to keep exposure:
Original: F-Stop = 8, Shutter speed = 500, EV = 15
Later: F-Stop = 0.7, Shutter speed = 64000, EV = 15

[The3DNut]

Thanks for that. Is there a math formula to figure it out because my F/Number of 0.1 is "off the charts"....which is really my point. I don't think I am seeing the "virtual camera" performing like a real camera so I am wondering what is going on. At this point though, having a math formula that would help me keep the same exposure value would be helpful. I also think something is messed up if a render that is normally 5.1 seconds to render takes over 30 minutes because of some slight DOF. That is so expensive I wouldn't ever want to even use DOF. Doesn't that sound like something might be wrong? I posted in the bug area so feel free to grab my test scene and see for yourself.

[JuhaW]

Libre Office Calc file: https://mega.nz/#!HNQ1FAbY!EVa7qxnnq...Q1ra2x12n2YMa4

[JuhaW]

Edit: New Shutter speed value is based on old F-Stop value, new F-Stop value and old Shutter speed value.

[The3DNut]

Thank you! that was really nice of you to post that.

[andybot_cg]

Thank you! that was really nice of you to post that.

+1

Thanks! I've always just fudged it. This can be really helpful

[Stugys]

can some one help to explain how can i make texture for area lamps like in this photo, or there is another way?

[ATTACH=CONFIG]30461

[Stugys]

that is my result

[Stugys]

[Stugys]

hello is anny body at home? can some one explain that, thank you

[bardo]

what are you missing in your renders?

if you are looking for the "circles" fo the LED lamps you should create a texture and map the area light with that texture...at least...in 3dsmax I did in this way.

[Stugys]

I am using area lights, ok will try that at evening

[leandro_cs]

As bardo said, use a texture in the "Rect Text" of the area light.