Blotchy skin when rendering multiple chars but not single char

opsdog

I'm creating a set of scenes where multiple characters (preistesses) will be opening a portal.  Some of the portal designs work for 1 preistess and some will work with up to 5.  So I've created a bunch of characters to choose from.

I threw them all into a scene, spaced them apart 60 units each along the X axis, set up a couple of distant lights, and one camera to show them all at once as a reference image to chose them from.

And 2 of them have blotchy skin.  One of them a small blotch in the forehead and the other one is blotchy from head to toe.

This is a crop from the full render of all of them - the middle two have the blotches:

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So I rendered them both alone and they look fine:

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So I rendered them with each other and they look fine:

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So I did a render with the 2 of them and each of the others (3 characters each render) and they all looked fine.

I did search the forum and saw references to skin issues if the characters are moved "far" from the origin.  All test renderes were done with each character moved at least 400 from X to simulate the conditions of the render of all the characters.  And the problem does not seem to be distance from origin related.

I also saw hair skullcap issues referenced in the forums.  But wouldn't that show up on the characters when I render them alone?

Has anyone solved this in a definitive way?

Here are the links to the full-size renders, if anyone thinks seeing them would help:

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Richard Haseltine

I'm sorry, but censor bars are not an acceptable way to cover nudity - https://www.daz3d.com/forums/discussion/3279/acceptable-ways-of-handling-nudity#latest

t doesn't take much moving things away from the origin to trigger issues, though they do require overlapping gemeotry - did the figure that was blotchy all over have a Geometry Sheel applied (for make-up, tattoos, or some other layered effect)? Did you try the single renders with the figure loaded into the centre of the scene, or was each one in the same place when rendered in isolation and in company?

opsdog

So I guess I should have just cropped to faces - sorry 'bout that.

 

Yup - both figures have make-up applied.

I did single renders both with the figures translated and centered in the scene with no issues.

They were not translated to exactly the place where they displayed the blotches in the full group, but they were translated in the same direction.  I think they were X translated in the full group to 240 and 300 and translated to 400 and 500 when done as the pair.

I'll keep playing.  Worst case these 2 figures will just appear alone all the time.

Richard Haseltine

Make up isn't necessarily an issue - there are many ways that it can be added, and using a Geometry Shell is the only one likely to throw an issue like this (and is probably the rarest approach).