Ghosting Image

pwharton · March 11th, 2008

The attached image is a revised image I am working on. I have moved the lights in the ceiling and when I render a new solution I get a ghost of the where the lights use to be. This Image is done in Viz 2008 and rendered with Mental render. Global Illumination is on and Final Gather is on and set to Low, the finish on the ceiling is an architectural material set to "paint semi-gloss"'Can anybody tell me whats going on?

Justin Hunt · March 11th, 2008

If you move lights and or objects and dont delete and recreate the FG and photon solotions, then you will get artifacting. This is due to the lack of fg/p samples or the shadowed samples from the old solution.

There are certain situations where you can get away without deleting/recreating the solution but its not a good idea

jhv

STRAT · March 11th, 2008

aye, looks like it's referencing to an old pre-cached solution. flush everything m8

pwharton · March 11th, 2008

I thought it did a new solution when I hit the render button. its goes through the Final gather pass before it gives me a render. Am i missing something? What do I need to do to delete the old FG?

Tommy Burns · March 11th, 2008

Press the X beside where it shows you where the map is been saved and then make another one with a different name (just in case) and don't tick the read only box

pwharton · March 11th, 2008

Thanks,
I'll give it a try when I get home tonight...

Justin Hunt · March 11th, 2008

If a FG file exists then those samples will get skiped over when recalculating, hence the need to delete the old fgm

jhv

pwharton · March 12th, 2008

Ok, I feel Dumb, I had unchecked the read only button and figured it would rewrite the file if I left the read/write button checked. Anyway any commits or suggestions are welcomed.

Justin Hunt · March 12th, 2008

Are you using the brushed metal preset for the hood?

If so change the bump map to a noise map, also inscrease the glossy samples.

Nice models

JHV

Tommy Burns · March 13th, 2008

Just start afresh with the FG file and create a file with a copletely different name to be sure your making a new one or just render it without saving any files to see if its ok

March 11th, 2008	#2 (permalink)
Justin Hunt Veteran Member Join Date: Jan 2005 Location: Brisbane Age: 33 Posts: 1,361 Name: Justin Hunt	Re: Ghosting Image If you move lights and or objects and dont delete and recreate the FG and photon solotions, then you will get artifacting. This is due to the lack of fg/p samples or the shadowed samples from the old solution. There are certain situations where you can get away without deleting/recreating the solution but its not a good idea jhv

March 11th, 2008	#3 (permalink)
STRAT Super Moderator Join Date: Dec 2001 Location: Cardiff, Wales, UK. Age: 36 Posts: 6,486 Name: Stephen Leworthy	Re: Ghosting Image aye, looks like it's referencing to an old pre-cached solution. flush everything m8 __________________

March 11th, 2008	#4 (permalink)
pwharton Member Join Date: Jan 2006 Location: Chicago, IL. Posts: 60 Name: Phillip Wharton	Re: Ghosting Image I thought it did a new solution when I hit the render button. its goes through the Final gather pass before it gives me a render. Am i missing something? What do I need to do to delete the old FG?

March 11th, 2008	#5 (permalink)
Tommy Burns Senior Member Join Date: Aug 2006 Location: Dublin Posts: 267 Name: Thomas Burns	Re: Ghosting Image Press the X beside where it shows you where the map is been saved and then make another one with a different name (just in case) and don't tick the read only box

March 11th, 2008	#6 (permalink)
pwharton Member Join Date: Jan 2006 Location: Chicago, IL. Posts: 60 Name: Phillip Wharton	Re: Ghosting Image Thanks, I'll give it a try when I get home tonight...

March 11th, 2008	#7 (permalink)
Justin Hunt Veteran Member Join Date: Jan 2005 Location: Brisbane Age: 33 Posts: 1,361 Name: Justin Hunt	Re: Ghosting Image If a FG file exists then those samples will get skiped over when recalculating, hence the need to delete the old fgm jhv

March 12th, 2008	#9 (permalink)
Justin Hunt Veteran Member Join Date: Jan 2005 Location: Brisbane Age: 33 Posts: 1,361 Name: Justin Hunt	Re: Ghosting Image Are you using the brushed metal preset for the hood? If so change the bump map to a noise map, also inscrease the glossy samples. Nice models JHV

March 13th, 2008	#10 (permalink)
Tommy Burns Senior Member Join Date: Aug 2006 Location: Dublin Posts: 267 Name: Thomas Burns	Re: Ghosting Image Just start afresh with the FG file and create a file with a copletely different name to be sure your making a new one or just render it without saving any files to see if its ok

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