Oh yes, I remember now, rendering with a smaller viewport was a DOF workaround introduced by TonyD...
I suppose lots of experimenting would require to figure what else is getting affected by rendering with different viewport sizes.

@mark: The viewport size also affects DOF. I don't quite remember which way...:unsure:

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Thanks for the info...so the size of the "viewport" affects the "output-render" quality of say an image sequence at 4k res?



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As you move timeline bar up (making a smaller viewport), you'd see artifacts gradually disappear. I suppose you'd stop shrinking viewport, when they are all gone. That would be optimal viewport size for rendering. As for influence to the quality of other project aspects, they would most certainly get affected one way or another. Like mentioned while testing your project Mark, I like edges sharpness better with full screen rendering, whereas rendering with smaller viewport bares output to be a little washed out. That influence would probably vary from project to project with different light settings/configuration ... etc.

OK looks like the size of the viewport really does makes a difference in regard to my opacity artifacts issues. Who Knew!!!!??? WOW! Thanks 4u2ges!!

Smaller viewport = no artifacts in my renders so far. :D     Even went back to the original little .jpeg map and all was well with the render!!

Now I guess I need to know... does the smaller viewport compromise the "quality" of other aspects of the final rendered output?
I never really thought it made any difference in the final output....boy was I wrong!!! And I have seen discussions about the viewport recently so I should have been paying attention.
It certainly helps in regard to these artifacts but are other aspects of a "high-quality" render  compromised by doing this small viewport "fix"?



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Oo that's good to know! Thanks 4u!!;)

Now did you still see the artifacts in the smaller viewport before you rendered?





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There... 5 seconds render with full screen (Ctrl+7). Artifacts are all there. And then same 5 seconds rendered  with small viewport (appr. 350x200) - no artifacts.
Full screen gives better contrast and details though...

THANKS!!!!! Yep looks like Direct X 12 may be the secret...as far as I know I can only go to Direct X 11 with Windows 7



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mark,
I made a render without modification of your project on my system.
Here is the result. (Windows 10, Avi full uncompressed, Directx12, gtx1080ti, iClone 7)

Now that sounds like a great idea. I hadn't thought of using a .png which I do love.;)  Here I substituted a 2000x2000 .png for the .jpg and as you can see, at least on my system, it made no difference. By the way I am working in iClone 7 at this point. The issue was also in iC6 but not in iC5. I have uploaded the iproject to DropBox would love for any and all to try it especially those with Windows 10 and a beefy display card to see if you get better results or eliminate the issue all together. You'll notice that some camera angles don't have a problem while others certainly do.
Feel free to try any and all options to get acceptable results.   Here's the DropBox link for the iClone project...

https://www.dropbox.com/s/7veydbcyq9vkvyh/%21%20PNG%20OPACITY%20MAP.iProject?dl=0



 



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