FG Map & Rendering Time

[Claudio Branch]

I know that using an FG map is effective for reducing GI flicker in animations, but apparently it improves render times as well?

 

I recently did an animation using only Final Gather and prior to utilizing the map I had render times at 15:00 (800x600 w/ AA settings 4, 16).

 

There was some flickering going on so I saved off my FG map with these settings: (320x240 w/ AA settings 1/64, 1/64). The FG map build was very fast for a 900 (30 sec) sequence.

 

I resubmitted the frames with the original settings and the render times are now averaging at 3:30 (almost 5X faster).

 

Anybody else had similiar results?

[Justin Hunt]

Absolutly, in fact it is the prefered way to render an animation and especially so with large renders.

 

To squeeze a bit more time out of the FG calculations and save some memory, turn off "view FG calculation" under the mentalray tab in preferences.

 

JHV

[MasterZap]

Absolutly, in fact it is the prefered way to render an animation and especially so with large renders.

 

To squeeze a bit more time out of the FG calculations and save some memory, turn off "view FG calculation" under the mentalray tab in preferences.

 

JHV

 

Also, don't forget to set the FG map to "Read Only" (in the render dialog) for the actual render of the animation!!

 

/Z

[Claudio Branch]

I read a post on this topic some time ago, but cannot seem to find it now.

 

The sequence of frames I did do not flicker, but have some splotchiness in areas you would not expect to see it, like in the center of a face with no corners nearby.

 

Anybody remember that original thread? I may be missing something...

[Claudio Branch]

 

Anybody remember that original thread?

 

 

Found it...Re: Mental Ray Animation

[Justin Hunt]

Also, don't forget to set the FG map to "Read Only" (in the render dialog) for the actual render of the animation!!

 

/Z

 

Nice to see you here too Master Zap, Welcome

 

JHV

 

(AKA Hoppergrass)

[MasterZap]

Oh thanks.

 

I lurk here a lot, but often Jeff steps in before I have to say anything

 

(Waves to Jeff)

 

/Z