I have encountered a bug concerning the IES files assigned to lights.
Please refer to this video I uploaded on my YouTube channel for a clear demonstration:
In my project, I created several groups of lights, each with its own IES file. Unfortunately, when I activate (make visible) two groups at the same time, the first group incorrectly adopts the IES files from the second group, even though its own IES files are correctly loaded.
This issue prevents me from proceeding with my work. I kindly ask you to fix this bug so that each group of lights properly displays its assigned photometric file.
Let me know if you need my scene to catch the bug.
I tried to replicate the issue on my end but it seems to be normal. You can check my video recording in this link: Unique Download Link | WeTransfer
Additionally, you may want to try to:
Ensure that these files are located in your local file path; if not, try to do it and see if the IES issue still persists
Change the custom IES name to something short/concise without any symbols.
If the issue persists, please send us your D5 File and custom IES. You may send it to support@d5techs.com and have it titled ‘Clov-Forum IES Lights Bug’
I watched your video, but you are only showing the geometric representation of the IES files, not the actual resulting lighting distribution.
In my video you can clearly see that the IES profiles are correctly assigned to each light group:
The wall washer lights (illuminating the basement wall) display the correct IES shape and, when they are the only active lights, they illuminate the wall properly with the right photometric distribution.
The IES lights for the interior bezel of the windows also show the correct IES shape and work properly when activated alone.
The issue occurs only when both groups are turned on at the same time.
If I first activate the window lights and then the wall washer lights, the wall lights incorrectly adopt the distribution of the window lights.
Conversely, if I first activate the wall washer lights and then the window lights, the window lights adopt the distribution of the wall lights.
In other words, the second group that is made visible always loses its own photometric distribution and inherits the distribution of the group activated first.
I’ve sent you the zip file following your instructions.
To better illustrate the issue, I’ve also prepared the scene and documented everything in this YouTube video:
As you can see, this is clearly a D5 bug: when switching on/off a group containing sub-groups with lights, the program randomly reassigns the IES files.
This issue is blocking me completely. I urgently need it fixed because I must present this project to an important client, and in its current state I cannot deliver it.
Thank you for providing the video and additional information. We have reviewed the files and were able to replicate the exact behavior you described.
Interestingly, when we tested the same IES files in a simpler scene, the issue did not occur. This suggests that the problem is specific to your scene file and will require a deeper investigation from our team.
Anyway, I have reported this issue together with your IES file and Scene file. We can’t promise an immediate solution (1 day solution) but we’ll try our best to pinpoint the problem and see what’s causing it
