does anyone know why this artifacts keep appearing?

What artifact?

The tiny bit of white on the side of the waist? I suspect texture filtering is the culprit. Whoever made the color map didn't know the right procedure. They forgot to color outside the lines.

You can set texture filtering to None in all the Image_Map nodes in the material.

or

You can decrease the rendering setting Min Shading Rate to well below 1 - usually .2. This will likely increase render time.

grr it doesnt seem to save properly on a jpeg and rendo doesnt like tiffs

theres lots of tiny light blue dots all over the texture ive tried enabling/disabling each map on the texture and i cant pin it down it only occurs when using all the maps

just tried all of the above remedies to no avail

try again

I see them now that I know what to look for.

I see Image_Map_4 the bodysuit LUMINOSITY map goes into ambient, which is that blue color.

I suspect that map has the dots built right into it by accident. Examine that map closely.

Render with Ambient_Value = 0  - do they go away? (I know all the blue glow strips will be gone, but if the little dots are from that map we'll know.)

I see your problem.  At a guess, the "Luminosity" section - which is driving the Ambient channel output - is not producing pure black where it should.  Maybe the image map is full of JPG artefacts, which could appear black to your eye but in reality are a non-zero colour.

Thanks for input guys :-) i have tried the remedies youve suggested and it helps the luminosity map was in uncompressed tiff but i made a separate map just to make sure there werent any stray pixels involved, and i dropped the texture filtering too which helped. im starting to think that the displacement is somehow driving the problem. ive tried lowering the value and it also helps,but i DO need some displacement as just using the bump map doesnt come out too well

I asked to render with ambient value at zero and then do they go away?

yes they go away with zero ambient i tried that lastly sorry

OK so you noted that dropping displacement helps. That's interesting but probably not important. If the spurious blue dots line up with spurious displacement dots as well, they would become more obvious. Why would they do that, you might ask? Well a lot of vendors make mistakes on layers where they apply an effect to the wrong layer - a subtle one. They end up with an effect on multiple layers unintentionally - an effect that is synchronized by virtue of how the mistake happens. If the ambient map happens to have dots in it lined up with dots in the displacement, they would be emphasized.

Do this- set Diffuse_Value = 0, Specular_Value = 0, Displacement = 0, and Ambient_Value = 10. Render again and show. If you see blue or white dots, then for sure the ambient map has junk in it.

If you still don't see them, try Ambient_Value = 50.

This render is way too small and low-res to see the dots. I could barely see them on the image you posted Friday.

Render with exactly the same settings and size as you used on Friday.

And don't use so much JPEG compression. You can post up to 200KB size. Your image is 17KB.  The compression noise is so bad the edges of the glow are wavy.

Quote - the luminosity layer does not have any stray pixels in iy Btw >

How do you know? That's what I'm trying to verify.

Quote - so you are saying that all my textures are mingling together in unexpected ways?

No - I was responding to your observation that adjusting displacement altered the outcome. You didn't show me a picture of that, so I just guessed at one possible explanation.

My theory is there are stray pixels in the ambient map.

i went into photo shop and cut out the luminous pieces and pasted them on a white background,if stray pixels were there theyd show up. ive just flattened all my maps no texture filtering saved in tiff format no compression still same result argh

the render is of sufficient quality to see the artifacts when they appear its just that they didnt on the last render thats all

i used jpeg to get the image to upload here btw i dont ever use jpegs in my textures to start with so i can keep the quality good

This is difficult since you don't show me what you have or what you get.

I'm not taking your word for it. I can show you dozens of images where you see absolutely nothing yet there is an entire picture full of detail.

What do you mean you cut out the luminous pieces and pasted them on a white background? Are you suggesting you think you can see something with an alpha of .01 or less?

Did you set Ambient_Value = 50? What did you see?

Believe me, there's something you are not telling and you're relying on your understanding of what to show, what to try, what to look at, but that hasn't got you anywhere has it? You need to do the tests I said.

When you render with Diffuse_Value = 0 Specular_Value = 0 Discplacement = 0 and your Ambient_Value = 50 and you save as JPEG at 75% or higher quality, I will be able to see what is happening.

Look - you can let me figure this out, or you can study image math with me for a few weeks. Take your pick, but so far you've made no progress and I would have this solved already. Your best bet to figure this out in a few hours is to do what I ask.

ok take your point im at work at mo but will send you a render as soon as i can, when i did what you asked yesterday and rendered out i couldnt see any artifacts but will do it again when i send you the render,apologies for any inconvenience

Cool. Not a spec of dust there.

Leaving everything as you just did, can you put the displacement back on and render.

the artifacts are back again now

Sorry I can't think of what it is. Based on the shader you posted the only thing I had to go on was that you had blue dots and they had to come from the glow map. The Jul 20 images contradict that. I have no idea how displacement could cause the dots.

i was rotating the mesh after id posted that pic and id noticed that it looks as though the displacement had punched holes in the mesh and i that i could see the luminous portion of the back of the mesh if you get me, i could understand if i had put huge amount on the displacement amount but its reatively minor.

thankyou very much for your assistance though, if i ever get to the bottom of this i will let you know :-)

Out of curiousity, which Poser version are you using?

Quote - Out of curiousity, which Poser version are you using?

Poser Pro 2010.