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Something in Aakash (Mousso) materials reacts drastically to camera headlamp

mmdestinymmdestiny Posts: 197
edited May 2025 in The Commons

I can't seem to figure out what, but there is something funky going on in the materials provided with Mousso's Aakash if the camera headlamp is on and you're in interactive Iray preview.

My system is quite powerful, I can use interactive rendering fluidly, uninterrupted in most scenes I work on.  But simply having Aakash in a scene will slow the interactive render down to the point the screen goes black during any adjustment if the camera headlamp is on.  If it is switched off, the problem goes away and it's instantaneous, fluid rendering while navigating the scene again.

I've tried literally removing every map and zeroing out every setting on the surfaces and nothing has an impact, so I can't figure out what could be causing it, or why it would be interacting specifically with the headlamp.

Has anyone else encountered something like this before?

Post edited by mmdestiny on

Comments

  • Richard HaseltineRichard Haseltine Posts: 108,247

    https://www.daz3d.com/aakash-hd-for-kala-8

     

  • Richard HaseltineRichard Haseltine Posts: 108,247
    edited May 2025

    Hmm, I just tried adjusting the pose and DS crashed - I don't think I had been doing anything else dangerous earlier in the session. Having relaunched, I don't get a black Viewport when adjusting the camera but it did crash again on posing (which may be a problem with my Genesis 8, I haven't used the base 8s much for a while).

    Using drag to pose with the Universal tool is crashing DS in the general reelase but not in the DS 2025 alpha, so probably a plug-in issue of some kind and not related to the particular character.

    Post edited by Richard Haseltine on
  • TaozTaoz Posts: 10,266
    edited May 2025


    I've had problems with camera headlamp or using Perspective View slowing down the viewport to a crawl with some products (like hairs, AFAIR), but not recently.  So I tried to load the Aakash character but no problems here. I could spin the scene quickly 360 degrees around. That's with 15+ year old hardware and a GTX 1070, DS 4.24.0.3 and NVidia Studio driver 552.22 (newer drivers causes a BSOD when rebooting after install, on that system).

    However, I then tried to apply a bikini:  https://www.daz3d.com/dforce-su-bikini-set-for-genesis-9-81-and-8  and after that, everything got very slow.  The funny thing is that after deleting the bikini again, it remained slow, just about the same. 

    I then tried to create a new scene, which loaded the same default scene I use, and loaded Aakash again. And again it would move and spin and render quickly.

    Then I started the screen recorder and repeated it all, and same thing happened  -  applying bikini and it got very slow, deleting bikini again, and still slow. 

    Not sure what's going on here. You can see the video here:

    https://app.screencast.com/NjwOTTK0Il0NM

    Post edited by Taoz on
  • butterflyfishbutterflyfish Posts: 1,488
    edited May 2025

    How strange. I'm not seeing any problems with her in the general release. I tried posing, moving the camera and dragging to pose, all in iray preview with headlamp on.

    Post edited by butterflyfish on
  • mmdestinymmdestiny Posts: 197
    edited May 2025
    I'll try to make a screen record after work. It's night and day difference for me with that material preset + the lamp on/off, and I'm fairly confident that in my case at least I ruled out any other causes. Possibly the weirdest thing is as I said not even technically the material preset's forward facing settings are what's throwing the fit, as zeroing them all out doesn't resolve the issue, but if the Base G8F is loaded to replace it, everything is fine again.
    Post edited by mmdestiny on
  • TaozTaoz Posts: 10,266
    edited May 2025

    Well I only tested with headlamp on, so I've tried to compare with it on and off, now.

    I've also applied a different bikini, and a random hair, these don't seem to cause any significant slow down like the SU bikini did.  Headlamp on slows things down a little bit, but it's still easy to work with.  Some of my scenes are much slower than that, even with headlamp off (I rarely use headlamp anyway), it depends on the content. 

    https://app.screencast.com/QnDrPIcLi9bFw

    Perspective View has the same slow down effect as headlamp, as it (as far as I understand) is basically just a camera with a fixed headlamp.

    It's strange btw that your viewport goes black during adjustment, with headlamp on, it should only do that with both headlamp and preview lights off (ctrl+L toggles preview lights on/off).  I've turned preview lights off in this video, as you can see the scene only goes black when it's not rendering, when headlamp is off, when it's on however, it goes grey.  With preview lights on, it doesn't go black under any circumstances, for me.  But maybe that depends on what video card your're using.   

    I have no issues when posing her btw. 

    Post edited by Taoz on
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