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Hello all,
When launching certain renders on Maxwell 2, the result comes very grainy, even with higher SL. With Maxwell 1.x I used in general SL 12 to have a satisfatory result, with Maxwell 2 in some cases I'm going up to 16 and it's still not good, too grainy, as if from SL 8 to 16 it did nothing...
Does anyone have an idea what's wrong?
I don't know if it's relevant, but I'm working with big files (MXS around 300MB)...
Thanks!

It all depends on materials, light settings, scene itself etc...
For example, when you render a simple scene - like a cube under the physical sky,
it'll be clean after ~SL 5
And there're interior scenes that do not clean even after SL 20.
So, it's hard to tell what exactly is a problem.
If you post some sample images, people might help you.

I had the problems with the same images I rendered with Maxwell 1.x a few months ago. I did some small geometry changes in a couple of objects and relaunched. All the materials, camera positions, environment settings. etc. are the same. Before with SL 12 it was ok, now I went until 16 and it was still really grainy. Even if it spent a good number of hours calculating, the difference between SL 8 or 9 and SL 16 was almost none!

I know it sucks, but I would check all materials to make proper V2 versions. Sometimes some translations are not good. I would pay special attention to plastics and sss materials.

Is there a way to know if my materials were converted from V1 on a proper way or not...?

It would help if you can post some images, and some mxm files if you can to see what's going on in your scene.

How do you upload files here?
Or I can send you by email if you prefer.
Thanks!

[img]image_url_goes_here[/img]

Use an image host like imageshack.us to upload the images, then paste the direct link to the image in your post, highlight it and press the 'Img' button in the posting options to enclose it in tags. You can do a pack & go of your scene and email me a download link if you want.

Here it is:


This is SL 16 exterior rendering with Physical Sky... For an image like that, with SL 11 or 12 it used to be fine... Now as you can see it's still grainy...

Any idea?

Thanks!

The strange thing is that from SL 9 or 10 until 16 the image almost didn't refine...

.. any chance that "white 255" is in ref 0 ?

other than that.. it almost looks like caustic illumination, .. as if light was falling through glass.

is this a multilight scene? maybe there is a problem with sampling priority of different emitters...

White is 230 in ref 0. (I read the manual! )

Yes it is a multilight scene...

EONA wrote:
Yes it is a multilight scene...

i'd recommend to try rendering sunlight/environment only, turning all other emitters off for the moment...

see here: http://www.maxwellrender.com/forum/view ... 97&t=34182

Can we have a look at that white material?