Differences between a jpg image and the same image in Image editor.

[Alejandro Testa]

HI Roy,  I am re-rendering and image to make some changes in the design and solve some render issues, everything goes fine. I save the jpg image directly from autocad, then I save the nxt image open the editor and got some very bright spots in both pictures that are hanging in the wall.

 

I am posting both images in jpg format, if you need the nxt image let me know.

 

Thanks in advance

[akinlolu olugboji]

One of the materials (glass+rubble) has a bunch of invalid values whichis causing negative luminances to be calculated and stored.

 

This values I believe are as a result direct conversion of the material by Convert Legacy AR Material Library widget. Similar results with VCT in ordder to correct this (the glass +rubble) I had to correct the by creating a new ME using the original values.

[Alejandro Testa]

Maybe... I convert this material from old libraries.

[Roy Hirshkowitz]

Legacy materials are the most likely culprit.  Attach a VCT material that's failing if you've got one so I can test it.

[akinlolu olugboji]

The VCT is not failing just that it does appear as it is meant to be. Here!

[Roy Hirshkowitz]

This link doesn't work.  

What I'm interested in for this thread are legacy materials which cause a crash in the Material Editor due to invalid values.  If you've got one of these attach it here.  I've found two so far, one in Alejandro's drawing and one in Aloha.

If the VCT problem is that the conversion isn't producing the desired results that's a different topic.  Start a new thread and attach an example material.  It would be most helpful to see both the nXt and legacy format to diagnose this problem.

[akinlolu olugboji]

Here are some samples

[Roy Hirshkowitz]

Thanks.  These should all work with the fix I'm about to issue-- (today or tomorrow).