Why do some hairstyles cause NPC to fade and disappear?

[AWHA]

So, it appears that certain hairstyles that have physics can cause the NPC to disappear. Not something like a stealth boy, but the NPC going completely invisible as soon as the game is loaded. The NPC is still there, just not being rendered.

 

For example, I added some hairs from MISC Hairstyles (with the hair physics patch provided here) to an NPC, and the NPC disappears as soon as the game is loaded (I can see the NPC being rendered for a split second before going invisible.

 

I remember there being a similar problem in Skyrim, with HDT hairs causing invisibility. Does anyone know why this keeps happening?

 

I should add that this is NOT related to the invisible body bug (the one where the head is visible but the torso isn't being rendered).

[jorgen.klein]

9 minutes ago, AWHA said:

So, it appears that certain hairstyles that have physics can cause the NPC to disappear. Not something like a stealth boy, but the NPC going completely invisible as soon as the game is loaded. The NPC is still there, just not being rendered.

 

For example, I added some hairs from MISC Hairstyles (with the hair physics patch provided here) to an NPC, and the NPC disappears as soon as the game is loaded (I can see the NPC being rendered for a split second before going invisible.

 

I remember there being a similar problem in Skyrim, with HDT hairs causing invisibility. Does anyone know why this keeps happening?

 

I should add that this is NOT related to the invisible body bug (the one where the head is visible but the torso isn't being rendered).

did you test this without the physics as well? 

[AWHA]

13 minutes ago, jorgen.klein said:

did you test this without the physics as well? 

Yes, if I disable the physics addon the NPCs don't have the invisibility bug. So far this only occurs for the MISC Hairstyles physics addon.

 

The strange thing is, the physics addon does not cause the same bug for my player character, only for NPCs. I also have other hair mods with physics, and they seem to work fine on both players and NPCs.

 

Do you think the problem is caused by too many nodes/physics bones in the physics addon for MISC Hairstyles?

[jorgen.klein]

I had a similar bug, with Naked SOS giants... they were there. but not visible.. I still think it has something to with the phyics not properly working with the mod.. that the GPU go crazy and decides to make it invisible, since it can't show it normally on screen.. then you can also consider that ..IF ever NPC ingame has hairphysics (dont know if that is the case with your game) it may just be that your GPU is not able to manage it at all, which can also cause to make things dissapear to lower the stress, but that is something you may want to find out... the fact is.. that wihout the physics (and thus the stress) no dissapearance with... gone.. should be a clue to you

[AWHA]

11 minutes ago, jorgen.klein said:

I had a similar bug, with Naked SOS giants... they were there. but not visible.. I still think it has something to with the phyics not properly working with the mod.. that the GPU go crazy and decides to make it invisible, since it can't show it normally on screen.. then you can also consider that ..IF ever NPC ingame has hairphysics (dont know if that is the case with your game) it may just be that your GPU is not able to manage it at all, which can also cause to make things dissapear to lower the stress, but that is something you may want to find out... the fact is.. that wihout the physics (and thus the stress) no dissapearance with... gone.. should be a clue to you

I think the problem may be that certain hair meshes stress the CPU/GPU too much. Like I said I run plenty of hair physics mods with no issues, but the problem occurs only with specific hairs.

 

I've isolated the problem to the Ciri and Triss hair meshes in the MISC Physics addon. No idea how to fix them, but they are certainly part of the problem.

 

Funny thing is that they don't cause problems on the player, only on NPCs.

[jorgen.klein]

no that is not unusual coz like with KS hairdos for Bijin AIO with Physics, I have to implement seperately the physics to the NPC's while the player use a different setup, so no im not surprised.. 

[janedynamite]

On 8/16/2020 at 5:43 PM, AWHA said:

I've isolated the problem to the Ciri and Triss hair meshes in the MISC Physics addon

 YES DUDE, I have the same problem, did you ever find a fix

 

or better, you know how to remove physics from a hair?

[Reefymapupset]

I wish I could find a solution to this. It's depressing to have so many awesome hairstyles that aren't useable for anyone but the PC. Out of hundreds of hairs there are only about 5 that work on NPC's. Equally frustrating is that I can't find any results for this issue.