Spider webs that mark faces (solved)

RychardesRealmRychardesRealm Posts: 61
edited August 2019 in The Commons

Sometimes 'spider webs' appear on some of the faces I render. Tried re-rendering, shutting down the app, etc. with same results even to the placement of the webs. The image I have attached has a small instance though I have seen worse, both in my renders and others. Anyone know how to get around this.

 

Post edited by RychardesRealm on

Comments

  • CrescentCrescent Posts: 334

    Is it all over the face or just around the forehead and near the hairline on the sides?  If it's on the forehead/hairline, it might be a problem with the hair you're using.  In that case, try the exact same render but without the hair to test the theory.  If removing the hair fixes the issue, the hair either has a transparency map where some of the black areas aren't true black or the skullcap is causing weird render artifacts.  The opacity map issue can be fixed in an image editor.  The skullcap can probably be fixed by changing the scale of the hair by .1% or so.

    Also, have you tried fiddling with the render settings in DS to see if the lines go  away - upping the Rendering Quality and Pixel Filter Radius render settings?  The render will take longer but it might fix the problem.

  • dragotxdragotx Posts: 1,147

    It's caused by the hair poking through the forehead, usually the scalp.  Most of the ones I've seen it on have a Front/Back or size adjustment that will clear it up.  Also, if you have photoshop both the clone stamp and the healing brush tools are great for clearing up a minor case like this sample.

  • SOLUTION at the bottom of the post.

    Crescent said:

    Is it all over the face or just around the forehead and near the hairline on the sides? 

    Always on forehead near hairline.

    Crescent said:

    If it's on the forehead/hairline, it might be a problem with the hair you're using.  In that case, try the exact same render but without the hair to test the theory. 

    Yes, minus the hair the artifact disappeared.

    Crescent said:

    If removing the hair fixes the issue, the hair either has a transparency map where some of the black areas aren't true black or the skullcap is causing weird render artifacts.  The opacity map issue can be fixed in an image editor.  The skullcap can probably be fixed by changing the scale of the hair by .1% or so.

    Dropped the scale by 1.0% but no joy. Will play around with the scale after the bald lady finishes rendering. Hmm? I may have been altering the scale on the wrong item. (The hair I'm using, MRL Warrior, has five 'groups' parented to the character, and I have no idea where the actual braids are, did the eye thang on all five entries including the braids but I wanted to try the bald version so did not go hunting in the scene-tree.)

    Crescent said:

    Also, have you tried fiddling with the render settings in DS to see if the lines go  away - upping the Rendering Quality and Pixel Filter Radius render settings?  The render will take longer but it might fix the problem.

    Too much a newbie. I'm getting better mind you, still... laugh

    dragotx said:

    It's caused by the hair poking through the forehead, usually the scalp.  Most of the ones I've seen it on have a Front/Back or size adjustment that will clear it up.  Also, if you have photoshop both the clone stamp and the healing brush tools are great for clearing up a minor case like this sample.

    It was your post dragotx that jostle my brain in the right direction: Made me think I may have had the wrong group descaled, and I did. (I thought I had descaled ALL of the hair, this was before I realized there were 5 groups of hair.); Shrunk the scullcap by 0.1% and walla!

    I'm going to send pix, I hope, with both the problem and me working to find the solution. I DID or thought I did, send the pic showing the problem but for some reason, it did not.

    Pix are (1) problem with the hairline, (2) no problem on bald (minus the braids, check above); (3) no problem the hair minus skullcap; and finally, (4) skullcap reduced by 0.1%.

    spider web 2.png
    674 x 881 - 1008K
    spider web bald.png
    674 x 881 - 1M
    spider web no skullcap.png
    674 x 881 - 1M
    spider web skullcap 99.9%.png
    674 x 881 - 1M
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