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Sorry for the delay Totte, was eating a late lunch. I found the log and have the pdf for you. I hope this helps. I was using the emmissive shader that is in Default Resources for DAZ Studio on two plane primitives I had created. One smaller and above the larger one. Originally I had a sphere and large plane while I was working with Dreamlight's tutorials and it was thought the sphere might be the issue. But no. I created a clean scene, and new planes. I have your Emission Profile Master but never thought to use it.
Although his tutorials are for older versions of D|S it is interesting to see how DS6.25 has evolved and I think I am learning it better now.
Thank you for your help,
Mary
The crash happens after you select something from a popup menu ( which is isnt possible to see ) and then DS is reacting to that change, and crash interally in QtCore. So what did you select, an .ies file? Is that file OK?
It did it on two different .ies files, one I had used in 2025, and the other I got today and was able to use in DS4.24 without issue. And yes, the Surfaces tab, I clicked on the primitive, applied the emissive shader, then went back to the Surfaces tab and on Emission Profile, there is a drop down 'None' and 'Browse' when I clicked Browse I selected the .ies file from where I have it stored outside of Daz Studio and it is at that point as I accept it that D|S crashes in DS6.25. In a few moments the crash log shows up and I reopen the program.
In DS4.24 it just takes me back to the Surfaces tab to continue my work.
So, it sounds like the ies file its broken then if it doesnt load in DS 4 either, but Studio 6 should not crash. If that is the case ( as I interpreted it), file a bug report and attach the broken .ies tile to the report.
It can be so simple that the Iray in DS 6 (I havent checked that yet ), can use more of the .ies settings in the .ies, and if those parts are broken, it crashes ( but it should then have crashed in Iray, not in widge update. I can soon do a small test, your question inspired me to make a better IES builder for DS 6 ( that also can / should / might find errors in broken/incompatible .ies files. I think Iray only can handle Type C .ies profiles still.
No, I didn't have any problem using the .ies files in DS 4.
And the new .ies file I downloaded today, I sent to my Windows 11 computer and used it without issue on DS 6. I joined and downloaded that file from IES-Library, this is the link for that file.
@felis put me onto that source as he has been able to use their products on DS 6.
What is the significance of all these repeated warnings in the DS6 Beta log? I don't know what is triggering them. There are multiple repeats per second.
2026-09-04 00:11:59.285 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:11:59.285 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:11:59.285 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:11:59.285 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:12:30.313 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:12:30.314 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:12:30.314 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
2026-09-04 00:12:30.314 [WARNING] :: Unknown uniform type or value: QVariant(Invalid) Please check your QParameters
@memcneil70: OK, I gave this .ies problem a look through, and I see now that the promo that was rendered in DS 6, the EPM lights were setup in DS 4 as EMP doesnt work in DS 6. SO You are abdsolutely right, DS 6 crashes when you set an .ies from the surface tab, but .ies renders OK if set other ways.
I file a bugreport and contribute you as the original finder. I've tested both in release and betas of DS 6, crashes are very consistent and the same.
EPM = Emission Profile Master
What is EMP?
Sorry, EPM ( I think autofuckup went in ) Emission Profile Master
Btw, I did a quick test to install .ies profiles in DS 6 using code, and it works like a charm, borth for lights and the old EPM props,
Thank you Totte. That is generous of you. I was lost totally and turned to the experts here. I am going to continue to use DS6 Beta to try out other older tutorials and see what I come up with. And it is a great exploring method. I will post if I see any other issues after I have tried them also in DS 4.24 and in my Windows 11 versions.