Hi, sounds like maybe the Autodesk Scenecleaner conversion script has maybe converted your vRay HRDI material? The binding to the sun highlight point might break if it did that.
The Corona Render converter has caught me out before. I was a using vRayHDRI and it converted it to a simple bitmap instead. Until I found the checkbox that stopped it doing that.
What render engine are you using, and what's the reason for needing to use the Autodesk in-house scene converter? I never use it myself. There were suposed to be a big list of presets getting built for it, but it still seems purely Arnold Render orientated now, so me using Corona and vRay I don't go near it. It scares me.
I use this scene cleaner regularly on scenes with mixed elements that are no longer required. It's pretty good. Is this the one you tried too from Scriptspot? https://www.scriptspot.com/3ds-max/scripts/cleaner
*(Be careful of removing 'Link Composites'. That should come with a warning. If your 3DSMax scene is linked to a Revit, SketchUp or Lumion Live link that can really mess stuff up. It's essentially deleting all XREFs from the scene).
I also use the 3DSMax Asset Tracking window, and remove /paths/remove missing assets. That takes a software restart sometimes to show how much unrequired stuff is removed from the scene. It's pretty good though ([Shift]+[T]) in Max.
Another tip I'd say is, if you're using the SME (Slate Material Editor)... switch over to the CME (Compact Material Editor) for a few minutes and look in Utilities Tab. You can reset material editor, and condense Multimaps. Also, back in the SME, delete any unused SME material pages. Max has to load these up, even if the materials have been already deleted from the scene.
Ideally 3DSMax should do this on its own. It's lacking a good all-in-one scene cleaner, which they could easily build themselves. Hopefully one will come soon.
https://forums.autodesk.com/t5/3ds-max-ideas/3d-max-heavy-files-purge/idi-p/7049422
🙂
Regards,
Darawork
AutoDesk User
Windows 11, 3DS Max 2026, Revit 2026, AutoCad 2026, Dell Precision 7875 nVidia - Quadro RTX4000 ATA - AMD Ryzen Threadripper PRO 7965WX 24-Cores - 128GB RAM