Glasses

[SATtva]

Artwork for some website. No postprod, though I had to render them all separately (with border) to get rid of interreflections.

[Abel]

Looking great!

[tomb]

Great render(s)!

[SATtva]

:)) Thanks guys!

[SATtva]

The only thing that troubled me is jaggies in RGBA output (with or without premultiplyalpha) around edges. Is it possible to get smoothed alpha edges (or the whole glass object with only reflected light making it opaque)?

[Abel]

Is the jagging issue specific to this scene, or do you experience it in all your scenes? It looks like the alpha channel is not used properly in your image.

I've never had any jagged edges in the alpha channel in LuxRender. In this ugly glass I added the gray background in Gimp and the edge seems perfectly smooth:

glass_2.png (25.81 KiB) Viewed 1213 times

[SATtva]

Here's a similar scene exhibiting the same effect.

[Lord Crc]

Weird, works fine here...

edit: using 0.6 release

[psor]

I'm guessing here. He is using a snapshot and forgot to put the supersample option into the .lxs.
It happend once when I used a snapshot, then the borders of my image where filled with jaggies.
I haven't checked the alpha tho. As I did put the supersample option into the .lxs the jaggies
where gone. This is just a thought maybe it's something else tho.



take care
psor

[SATtva]

@psor, All renderings were done with 0.6 (hence no supersample), gcc 4.4. However the official 0.6 distribution gives the same result, so it's definitely not a problem with gcc 4.4, but maybe something system-specific. However I already checked this across three different machines (the only thing they have in common is that all of them are 64-bit Gentoo systems), and all of them have the same problem.

@Lord Crc, Did you changed anything in the blend-file (Lux-specific) before the export? What version of libpng is installed on your system? I have 1.2.38 on all machines.