Quick question

[__Leo__]

Im trying to render this scene... and am getting white chappy marks on edges and also right in a glass material itself...... what am I doing wrong??

Thanks in advance...

Leo

[losbellos]

i have to idea about it, maybe the photon count is too low,and/or there is problem with the unit setup/search distance.

[egz]

Is it still there if you turn on anti aliasing? What does your material for the glasses look like? you might not have enough glossy subdivs.

[__Leo__]

This is the setting I have for the material... Also antialiasing is at Fixed rate.. I dont think it should be from it.. because I had this setting before and still it gave me a nice glass look....

[egz]

AA Fixed rate at 1 is the same as Anti-aliasing off, and this is most likely what is giving you the artifacts. Try using adaptive AA instead.

Also your glossiness subdivs at 3 are a little low, try 8 or higher.

[losbellos]

if u use glossiness most part on the image,.fixed rate has better performance.Set it to 3-4 subdivs, Try with 3 first.

[egz]

I thought Adaptive QMC would be faster than fixed?

[__Leo__]

Here are the results folks..

I tried the same scene by playing with the AA and doing a trial and error theme....

Fixed AA: 15 seconds to render (not too bad for render time... bad result)

Simple 2 level: render time 50 seconds (same render quality too much time to render)

Adaptive: min 3 max 4: 8 mins

then just to try the render time I changed it to:

Adaptive: min 3 max 8: 21 min

The interesting thing is that this scene is only a test render where everything is hidden ..
I cant even imagine the time it would spend if I had everything in the image...

My question is: .. is there something wrong with the glass material I downloaded?? Cuz this doesnt seem right....

These are the images:

[Trapezium]

There is something wrong with your AA settings
Try -1, 3 for Adaptive

The subdivs are way too low in your material. I wouldn't go below 6 and no higher than 12 for glass. BTW, looks more like plastic with that much fog too.