P11 - V4/M4 - X-Ray Effect



  • Well hello there, Poserdites!
    I'm looking for a really good set of materials to create X-Ray themed renders from the V4/M4 figures with the Daz anatomy bundle included and some pointers on different types of clothes which could be worn, like what different kinds of clothing materials would look like X-Rayed. I know obviously metal would appear pretty much solid white, but I'm interested in other stuff too, as well as maybe props like chairs etc. I've got a series planned and would love to see it come to life. Seeing as all materials will be affected, I'm not worried about which renderer is used, so long as it's pretty much the best result we can get.

    If the series turns out well, I might decide to do a slightly more sci-fi series, with an unrealistic 'X-Ray machine' which can scan through things like cars... that would be fantastic, I'd love to do that! All in the same 'X-Ray' style, just with different depths and strengths.

    Another thing to consider is lighting, if any... I wouldn't have thought it would be a thing, as something is telling me light emitter with transparencies and no lighting rigs, but that's why I'm asking... because I've no idea!

    Thanks a million folks!



  • @glen85 Firefly or Superfly?



  • Hellooooo! I'm not really fussed because the only reason I mind which renderer I use is due to certain characters of mine having materials I've worked hard on and don't want to lose... with this, all the materials would need to be changed, so I'll lose everything and have to start fresh anyway. The absolute most accurate it can be would be preferable though... I've seen some 'X-Ray' renders which, while amusing to look at, have been totally unrealistic because the skin and muscle have been too opaque, whereas the bone has been too transparent and the internal organs, which usually appear as some kind of mush in a bone X-Ray, have been non-existent.



  • this is all I got. glow in the dark for SF.

    0_1551290330549_sheetgghost.jpg



  • Interesting! Does that use any external lights?



  • @glen85 no cause it's glow-in-the-dark!





  • Not even to charge it up... O.o



  • It sounds to me what you are looking for will most likely have to be done in an image editor post render. V4 and M4 don't have a 'skeleton' in the sense that we do. So you would have to do two renders, one with the V4 figure, then one with the V4 skeleton in the same pose and then composite them in GIMP or Photo Shop, etc.



  • @rokketman The V4 and M4 skeletons are conformable to V4 and M4. They fit inside the figures as well as the organs figure that DAZ makes.



  • @rokketman this is V4 in wireframe, with the conformed V4 Skeleton figure (plus lots of additional ERC) and the V4 organs (brain included)
    0_1551334278827_Screen Shot 2017-07-15 at 2.53.33 pm.png



  • @ghostship said in P11 - V4/M4 - X-Ray Effect:

    @rokketman The V4 and M4 skeletons are conformable to V4 and M4. They fit inside the figures as well as the organs figure that DAZ makes.

    @anomalaus said in P11 - V4/M4 - X-Ray Effect:

    @rokketman this is V4 in wireframe, with the conformed V4 Skeleton figure (plus lots of additional ERC) and the V4 organs (brain included)
    0_1551334278827_Screen Shot 2017-07-15 at 2.53.33 pm.png

    I understand that the skeleton and muscle figures all fit inside V4, but can you render it to look like an x-ray image?
    @anomalaus that's a preview image, correct?
    So can someone put those together like that and render it to see if they can make it look like an x-ray?
    I don't want to come off as sounding blow hard or stubborn, I am just not sure how to pull of what the OP is talking about all in Poser...



  • @rokketman yes, that is a preview, with the wireframe.

    From some minimal research on X-Ray effects in Cycles, it looks like the best technique for a single-pass render is to make materials use a TransparentBSDF surface and Volumetric absorption.
    0_1551354562108_Screen Shot 2019-02-28 at 10.47.16 pm.png
    That gives this kind of effect. Since the absorption strength is compounded with every surface passed, actors like the breast, which is modeled in detail, will need a much lower absorption density than the skin surface.
    I've only selected a few of the various materials to treat this way, and I think that more could be done with the transparentBSDF colour, as has been done with @bagginsbill 's tricky glass, to give more definition to the edge, as though the skin were denser than the muscles underneath. i.e. use a fresnel type technique to add contrast to the surfaces parallel to the line of sight. This is not at all physically realistic, I know. One of the first exhortations of the post describing this technique was that all materials should be modelled as close to physical reality as possible. For a light bulb and filaments (as was used in the example), that obviously means that the glass must have thickness.

    Unfortunately, unless one wants to splurge tens of thousands of dollars on realistic, modeled-from-life wares from Zygote, et al., we have no Poser models which accurately represent human musculature and tissue densities, just surface textures.

    Alternative tricks are to use emissive and translucent surfaces, which give that kind of X-Ray effect, with clearly outlined edges, but that introduces extraneous light into the scene which is hard to cope with unless that's the exact effect you want. Radioactive corpses ;-)

    Here's the reference I'm quoting: Render with CT scan effect
    0_1551355271390_SAEmq.jpg 0_1551355281364_ECleh.png



  • This was rendered in PoserPro11 using Firefly and the x-ray effect from Ajax's free shaders. M4 with the M4 skeleton inside. It doesn't work so well in Superfly though.

    0_1551360791762_xray-effect.jpg



  • @raven yes, that's the (I think it's) EdgeBlend effect I was thinking of, though the bones should probably be more intense (i.e. represent a denser material) than the skin surface for closer proximity to an actual X-Ray.

    IIRC, the tricky glass uses EdgeBlend plugged into the TransparentBSDF node in SF to darken shadows from glass edges.



  • @anomalaus More like this then? I adjusted the Edge_Blend's outer colour and the attenuation to make the skeleton show up more.

    0_1551364724328_xray2.jpg



  • @raven yes! Definitely on the right track there. In my memory/imagination (absolutely unmotivated to trawl through cupboards and look at my own X-Rays/CT scans), I think that the darkest area of the bones (inner colour) should still be lighter than the lightest area of the skin/flesh. These days with digital scanning and processing of medical images, one can increase the contrast of the structures one wishes to examine, at the expense of contrast elsewhere. With Computed Tomography, noone looks at the raw data, just processed slices, but that's a long way from what one might imagine a piece of representative art will display to convey an idea.



  • Now we are getting somewhere. It's not working in Superfly, though? Or did I miss something?



  • @rokketman No, I'm afraid that was a Firefly render. The OP did say they weren't preferential on which renderer so I just showed that possibly the look they want could be achieved in Firefly.
    I admit to not really understanding the different Superfly nodes to get desired effects so tend to just use premade SF shaders that I can adjust, hence the Firefly render! :)



  • Enjoyed this thread which started me playing. :)
    Here's a pic with some playing around with the shader to make the skeleton a different colour to the skin. The interior anatomy parts are just textured/shaded as they loaded.

    0_1551447188954_xray_mike_crop.jpg