Global illumination/final gather
 

Hey guys,

iam having a problem trying to get my render sorted, i've had a play with the FG and GI for days now and for some reason the light emitions or the FG are leaving these unwanted bolch's, i've raised the GI options/Radius up to a very high count,but still no joy.

can anyone save me from this pain!!

Thanks.

looks like your interpolations in GI are too low.

hey man,

is that in the render settings tab, if you could explain a little more?? iam a noob you see lol.

cheers

i'm a noob too, ok i've hada look in maya and made a simple GI thing... from what you said try reducing the radius to 0 and just increase the photons on the light.

ok ill try that, and thnks dude. ill get back to you and let you know.

cheers

no, its just not working, its so hard to find out the info. Thanks for the info though.

ill just keep trying.

Show a screenie of the render settings.

Here is my render settings for GI/FG ive tried everything i can think of.

..

shouldn't the number of photons be around 100k?

do you mean the instensity? or am i looking in the wrong place?

yeah the intensity, i think the defaut is about 50k.

The default photon intensity on a light is 8,000, GI Illum photons are 10,000 I think. The photon intensity on the light seems really low but then again I don't know what you had set the GI scale to. I think the problem is the GI Radius. I see you have FG checked also, can't see the settings there, it could be fighting you're GI settings. Also I see you had to grayscale your screenshot to get it under 200k lol :p, if you have Photoshop, Go to File, go to that save for web and devices option, hit that lil arrow (see the pic), choose optimize to file size and enter whatever number and voila. Really handy.

thanks guys your being really helpful,this is the first time ever i have had to deal with FG and GI. but once these light emitions are sorted, will my render look crisp and clean?

GecT, love your work, i can tell you deal with lighting alot, keep up the good work man!! and thanks for the tip with my screen shot lol

only one way to find out! render that biatch! (but in a smaller resolution so it won't take as long to find out...)

well tht was helpful!

is there anyone that can help this matter. anymore comments are useful,tips and tricks.

HELP PLZ!!!!

http://www.interstation3d.com/maya/t...g/indoor01.htm
That helped me with my illumination problems :)
You need to be less pushy :headbang:
He was giving you advice that you could have utilized...

i wasnt being pushy, sorry if you thought i was. thnks for the advice.

No problem :)
I'm actually having problems I can't fix now that I'm using a spot light and global illumination:)

When that happens and you're ripping your hair out, load the default render settings, this time don't go changing stuff all willy nilly, only what you know you need. Need GI? check on GI and nothing else. GI not showing? Check the photon intensity on your light(s) and make sure they're strong enough to actually travel from the light, make it to the objects and atleast do a couple bounces, so that means TEST RENDERS AND TWEAKS YAY!:p

When it takes 10-15 minutes per render of Global Illumination and Final Gather on draft or maybe preview it gets really old but your totally right reset everything then experiment more and
more :attn:
Never knew the intensity meant that it traveled longer,I should remember that and apply that to a few things :)

Yeah well, you have to be careful with the photon intensity, as too high a number will burn out the objects near the light source so you probably might want to back it down a bit and bump up the GI scale in the render settings then tweak until you find a nice balance between the two. Hopefully you're not rendering at a large resolution, personally I think 320x240 is fine for testing general illumination.

Thats a good point, i've been rendering in 640/480 lol. i have tried the model with a default sun and sky, it looks ok but to be honest the one i posted on here looks much better.

thanks for that tutorial link by the way. iam reading it as i type:)

This was a tutorial from digital tutors, its great for beginners to learn modelling techniques and texture techniques, the downfall is it dosent hit on lighting and render techniques, but i would recommend this to anyone.