Dforce hair simulation taking too long even on a 3090

Magic Dragon 3D

Hello everyone. I recently upgraded my video card from a 3060 12GB to a 3090, and I had some disappointments with the Dforce Genesis 9 hair simulation. I tried to simulate Dforce hair (the first time Daz asked me to compile the Dforce kernel for my 3090), and it took over an hour and a half to finish, which is extremely slow for a high-end card like the 3090. What went wrong? Could someone help me? DForce hair that I tried to simulate: dForce Classic Wavy Side Bangs Hair for Genesis 9, 8 and 8.1 Female NOTE: only my G9F were in the scene. All the other objects, accessories were hidden except the hair and character.

Elor

Hello,

What was the simulation settings?

With hairs, it usually a good idea to avoid simulating from a Starting Pose and setting Collision Mode to Best and keep Better (which is the Default value).

Magic Dragon 3D

Elor said:

Hello,

What was the simulation settings?

With hairs, it usually a good idea to avoid simulating from a Starting Pose and setting Collision Mode to Best and keep Better (which is the Default value).

Hey, thanks for replying me. Are you referring to the hair's DForce settings, or the simulation settings themselves? I'm far from my home PC right now, but I'll be back shortly during lunch break at work. I'll send you a screenshot with the settings I used as soon as possible.

Elor

The simulation setting themselves, in the simulation tab.

I tested it on my own machine and with a 4060 Ti, it never went longer than a couple of minutes even with the higher level simulation preset included with the hairs.

crosswind

Kernel compiling is usually done after a new Nvidia driver is installed or updated. The compiling process should just take less than 30 seconds. What's your Nvidia driver version as well as your DS version ?

I tested the simulation as well with a 4090.  With default out of the box settings on a bare A-posed G9, it took 35 seconds; with the longest simulation settings Preset B, 57 seconds.

Your figure has a pose ? You simulated with Timeline or Start Bones from Memorized Pose ? 

Besides, if other wearables on your figure have high Smoothing Iterations, even if you hide them, they will still significantly slow down the simulation. You need to at least turn Enable Smoothing off on them before simulation.

 

Magic Dragon 3D

Hey guys, I figured out the problem: apparently some other Dforce items had Enable Smoothing enabled and were interfering with the hair simulation. I was using a pose and facial expression, and I used Wearable Manager to hide all Dforce items and leave only the hair. Result? The simulation was extremely fast, as it should be on a 3090; it only took a few minutes. Phew! I managed to solve the problem! Next time I'll pay attention to this to avoid slowdowns.