Problem with AntiAlias.

[Zanrok]

Hey guys,

 

This is my first post here, and I have made this scene with the guide of a tutorial I saw online. Problem is, I would like to render in VRAY, and it looks ok so far, except that my AntiAlias is really screwed up, mostly near the window.

 

I have tried numerous different settings but I cannot seem to find one that will fix my problem. =(

 

Any advice on to exactly what setting I need to fix this issue would be appreciated. It should be noted that there is a VRAY plane light directly behind the window. I am not sure if that maybe a factor?

 

Thanks for any advice, heres a screenshot of the scene.

 

[aaron-cds]

If you're using adaptive qmc you can try setting it to min 1 and max 16 samples. There is a great tutorial for $7 on aa settings by Chris Nichols. - http://gnomonology.com/tutorial/62

[tayrona]

which AA filter are you using? it seems mitchell netravalli or catnum null? (sorry my spelling).... try area filter with 1.0

I wouldn´t use adaptative QMC in this scene with low details, I would prefer adaptative subdivision -1 and 5. (may be there are better solutions, but just try!)

[Crazy Homeless Guy]

my inclination s to say that this has nothing to do with the AA filter you are using. what you are seeing is the result of the color outside of the window being really far past 1 in float. do a spot test on the white, and you may find that it is up around 8 or 9 times brighter than white as we know it in computer graphics. ...becuase it is so bright, proper AA can not smooth the edge of it. you should be able to fix this by enabling clamp output and sub-pixel mapping in the Vray color mapping dialog.

 

this is a failry common problem, and the fix will limit the amount of information in your image, but there is a good chance you won't miss it.

 

if you do a search on the board, you will see other people that have this same problem.

[rivoli]

yep, what chg says. it's common problem in very bright areas, not a vray one, when working in full float. what you may want to try is avoid using a sharpening filter such as catmull or mitchell (or turn filtering off altogether), check clamp output and subpixel mapping.

[mahmud]

hi,this is mahmud from bangladesh......aaa..regarding your noise problem.....did u try out the rQMC sampler....reduce the rQmc noise threshold to .005...by default it is .01(i guess)...and plaese let me know what happend...you can also mail me here...harakiri_7@hotmail.com......ciao

[arturito]

would be interesting to know this thread conclusions.... any conclusion zanrok?? aa, filter or mapping???

[Zanrok]

I apologize, thanks so much for the replies and advice. I have been tinkering with different light setups and I wanted to show you guys the final image before I posted to say thanks!

 

However, at this time it seems like I will have to settle with the image the way it is and move on.

 

First off, I tried all of your solutions but CHG's worked the best! I turned clamped output on and sub pixel mapping, and the AA solution was fixed!!

 

=)

 

Now my next problem, im trying to fix the table shadows, atm they are dull and to me it does not look realistic enough. Your thoughts and opinions on this matter would be great.

 

Here are two screenshots, the first was done in a low setting, hence the quality not looking the best. You can also notice the shadows on the table seem to be non existent, what I did to simulate the shadow is add another direct light in the scene closer to the table at a low setting with a greyish/purple color. I like the way the light shines on the floor. However it is sooo bright that it washes out any texture where its shining! =/ Ideally, i would like the light without the loss of information and overbrightness.

 

The second shows the shadow i want on the table, or something similar. However, whenever I add a vray light (plane) in the window the visuals on te window degrade, it makes it look flat, moreover, the noise on the walls and floor go to extreme.

 

Well let me know what you think, thanks sooo much again!

 

I will be tinkering with more settings today and try to figure out what is the best option!

 

 

 

second image.

 

[Zanrok]

Thought i would post my final image, Unless someone spots a huge problem, I think will move on to other projects!

 

Thanks so much for all of your help guys, learned a ton doing this.

 

I was able to fix the lighting on the floor as well as the shadows from the table... It took a lot of tweaking!

 

http://www.wrightsonstudios.com/3d/sofa_scene_render_1.jpg

 

[Brian Smith]

have you tried using a vray light plane just inside the window as a fill light...if not then you should definitely try it. it will improve the image and definitely reduce render times (because you dont have to use such high quality settings to spread the light around as evenly).

 

also try these settings

 

ir map, medium preset, hsph subdivs=20, inter samples=50

lc subdivs = 1500

adapt qmc image sampler with a min/max = 2/5 or 3/6

 

everything else at the default value...i think you will find good results