[Nova66]

I've already reported this problem in the Developer section of the forum but since this bug is still present in v3.1.99.10 I thought I'd post here in the public beta section.

What it comes down to is that the Spherical & Lat-Long panorama lenses do not render interior lights in the same way that the Thin lens does.

Here is the Cornel Box that comes with Maxwell, rendered using the Thin Lens up to SL:17


Here is a crop from a Spherical panorama render of the same scene and as you can see, the lighting seems to be missing the specular highlights:


This is a really bad outcome and makes the panorama lens somewhat unusable for interior scenes. Is there any chance that this could be fixed for the commercial release of v3.2?


Cheers,
Andrew.

[Nova66]

We have a new beta version of Maxwell (v3.1.99.11) and this issue is still present.

We haven't heard anything from the developers and I'm not sure if I'm being a pest by reporting this bug over and over again. I don't even know if Next Limit consider this issue to be a problem but to my mind the fact that the Spherical Lens does not give the same results as the Thin Lens is a serious problem and makes it very difficult to get the desired lighting effect when doing interior 360° panoramas.

Are there any plans to have this issue corrected for the commercial release of v3.2?


Andrew.

[Nova66]

The announcement for "v3.2.0.0 RC1" states that "We will be glad to hear your impressions and suggestions", so with that in mind I've got to bump this post.

Please can we have a comment from Next Limit on this issue of the missing primary illumination when using a spherical or Lat-Long lens? This bug is definitely a regression because I had no problems with this issue way back when Maxwell v.3.0 was released.


Cheers,
Andrew.

[Nova66]

The commercial release of v3.2 still doesn't render lights properly when using the Spherical or Lat-Long Stereo lenses.

I didn't think to try this earlier but as it turns out, the FIRE preview DOES render the lights properly so it should be easy enough for you to see that there is something seriously wrong with the main render engine and how it treats the Spherical & Lat-Long lenses.

Would it help if I gave you my Cornel Box sample files that show the problem?


Cheers,
Andrew.

[seghier]

Hello
i tried with this scene ;it look that there is a gradient circle

[Nova66]

i tried with this scene ;it look that there is a gradient circle

It's great to see someone else taking a look at this issue, thanks Seghier

The top left image is a FIRE preview but I'm not sure what the other images are about. How did you get the lower right image?


Thanks,
Andrew.

[seghier]

Thanks
the other image is the render and you can see that there is a geadient circle ; i used photoshop to show the limit of this circle

[juan]

Hi Andrew,

Sorry, we do not ignore you, and of course you are not pestering at all. It is just that due the crazy amount of work sometimes it takes time until we can check if a report is really a bug, and in that case how we should proceed. But we read all the reports, discuss them and try to fix them all for the next update.

In this case we have found something wrong in the new stereo lenses (latlong and stereo fish) but that was working fine for regular spherical lenses, could you confirm that? From your post it is not entirely sure if non stereo lenses are fully working. If that is the case please upload a scene, we cannot see anything wrong here. LatLong and stereofish will work much better in the next update, hopefully in very few days.

Thanks!

Juan

[Nova66]

Thanks for taking a look at this issue Juan, I was really getting desperate for this to work properly.

From your post it is not entirely sure if non stereo lenses are fully working.

The Thin Lens works perfectly but both the Spherical & Lat-Long Lenses do not.

Here on the left you can see the good Thin Lens render and on the right the bad Spherical/Lat-Long Lens render:


Along with the missing bright spots on the walls and floor of the Cornell box in the right image, you can also see some unnatural darkening on the edges of the knot and also the really obvious faceting that simply isn't present in the Thin Lens render on the left.

You can download the sample scenes from here:
https://drive.google.com/file/d/0B2THCA ... sp=sharing

I hope you can reproduce the problem with the sample files because I can't make interior lighting work properly with any of my 360° panorama renders.


Thanks,
Andrew.

[juan]

I am not in front of a computer right now so I cannot check it but from our preliminary tests here you should expect to see it fixed -or at least vastly improved- in the next version. We aim to release a new build early next week, please let us know if it works.

Thanks for the report!

Juan

[Nova66]

from our preliminary tests here you should expect to see it fixed -or at least vastly improved

Hi Juan,

I'm sorry to say, but this bug is still present in Maxwell v3.2.0.2, I can't see any improvement at all
When you render the sample scene that I uploaded in my last post, do you see the three problems that I talk about in the right image?
* Missing bright spots on the walls and floor.
* Unnatural darkening on the edges of the knot.
* The really obvious faceting that isn't present in the Thin Lens render on the left.

Andrew

[T0M0]

In release notes of 3.2.0.2 isn't mentioned if this bug is fixed. Only some GUI fixes related to StereoFish and Lat-Long Stereo lenses in Studio.

I noticed the faceting and dark edges effect in 3.2.0.0 too, but in 3.2.0.2 those dark edges are still there, also the image look much darker in corners.

If I switch the engine to Draft - RS0 and render it, the effect will disappear.

(pin hole pic was rendered only to SL6, spherical to SL14)

- devignetting was set to 100
- tested with Maxwell Render 3.2.0.2
- Windows 7 x64

[Nova66]

If I switch the engine to Draft - RS0 and render it, the effect will disappear.

The Draft Quality setting is certainly better than the Production Quality setting but it's still not perfect. Your Spherical Lens test render shows a distinct darkening on the edges of the knot.

I did some more tests with the Draft engine and to me the renderings seem to be slightly less saturated and the light source in the Cornell Box has some very coarse aliasing. So all in all, I'd really prefer to use the Production engine.


Andrew.

[T0M0]

It was just for testing purposes - switching to Draft engine. I never use it for final rendering :)

Some word from NL about this issue ? Thank you.

[Nova66]

I'm sorry to say, but this bug is still present in Maxwell v3.2.0.2, I can't see any improvement at all
When you render the sample scene that I uploaded in my last post, do you see the three problems that I talk about in the right image?
* Missing bright spots on the walls and floor.
* Unnatural darkening on the edges of the knot.
* The really obvious faceting that isn't present in the Thin Lens render on the left.

Hi Juan,

Now that the Lat-Long Stereo lens shader bug has been fixed, is there any chance that the above problems with the "Spherical" & "Lat-Long Stereo" lenses can also be addressed before the release of the next Beta?


Keeping my fingers crossed
Andrew.