I cannot get my Strand-based hair to render in iRay

ibr_remote aka infinity10

Yes, dummy here. I looked up other posts but nothing works.  

Gordig

The screenshots indicate that you're on the universal tool, which pre-empts one of the most basic troubleshooting steps. What's your line tesselation set to?

ibr_remote aka infinity10

Gordig said:

The screenshots indicate that you're on the universal tool, which pre-empts one of the most basic troubleshooting steps. What's your line tesselation set to?

I am a dummy in this, so I have no idea where to find the tesselation value.  Sorry.

ibr_remote aka infinity10

OK I have found something about Tesselation.  It is in the Parameters tab.  I have used the node-selection pointer.  Upon rendering with iRay, the strand-based hair still does not show up.

lilweep

what does the hair actually look like? (those curves showing in the viewport are just the SBH Editor style curves).

Can you turn on Preview PR Hairs in Parameters, or screenshot what it looks like on the Tweak tab of the SBH Editor.

 

edit: btw if you turn on Preview PR hairs you can visualise in Iray Preview.

ibr_remote aka infinity10

well, this is what I have. it is not showing in tweak view.. I have preview on

 

lilweep

Then you dont have any hairs... What does it look like in Paint and Distribute tab? 

ibr_remote aka infinity10

And here is my Distribute view, which look really weird to my, but what do I know, first time creating this in DS.

 

 

ibr_remote aka infinity10

ibr_remote aka infinity10 said:

Here is my Paint view

lilweep

ibr_remote aka infinity10 said:

ibr_remote aka infinity10 said:

Here is my Paint view

Very bizarre.

what's showing in your Paint tab is actually the Style tab?

The paint tab should be a black-and-white surface where you paint the map of where you want the hair to grow (white = spawn hair, black=no hair).  See image below.

Are you using a recent version of Daz? I've been using SBH Editor since it was released. I use it in every render i do and never had the issue you have.

Oh actually, now that i look closer, you just have the style curves checked "show style curves", so thats why i initially thought it was the style tab.  I would untick those so you can see the surface.  From what i can see it is painted white (?), so it should be spawning hairs.

On your distribute tab, you do have hairs spawning, albeit they have very high (too high?) base width for a 'normal' hair, but i think that should still allow them to spawn and be visible in render.  Maybe play with the paint and distribute tabs until you see hairs appearing as you want them to.  I usually use the Tweak tab to visualise the "final look", since it shows the effect of all the previous tabs combined.

ibr_remote aka infinity10

Hi All !!  I fixed my problem ! 

I did not paint on the scalp area of the figure.  I had actually generated a mesh from MakeHuman, extraced the parts of the scalp, fitted and morphed that extracted geometry to my customised Genesis 8 male, and then grew the hairs onthat geometry.  I had made that extrenal scalp invisible in my scene hierarchy, so of course, the strand hairs would not render ! After I made the external scalp visiable again, the hairs rendered fine.  Ah, so sorry for the other. Thank you for your effort to help me troubleshoot this. It was my error to begin with.

It reminds me of the family setting up the new TV set, and I forget to switch on the cable decoder box, so everyone was wondering why we could not get any signals with the new TV.  Oh boy.