Alain <aze### [at] qwertyorg> wrote:


> >> Alain<aze### [at] qwertyorg> wrote:

> >>>> I installed Pov-ray 3.7 and with some little changes on code I got
> >>>> this render:
> >>>>
> >>>> http://img829.imageshack.us/img829/8692/modsmega.png
> >>>>
> >>>> I didn't remove the save_file/load_file because I dind't find that.
> >>>>
> >>>> And where are the ini files of megapov? I tried Tools> Edit master,
> >>>> but this
> >>>> option doesn't exits.
> >>>>
> >>>>
> >>>>>> map_type 7 don't exist, you should transform the light probe to
> >>>>>> latitude-longitude format.
> >>>>
> >>>> I didn't do any thing like that.
> >>>>
> >>>>
> >>>> Sorry to only post here today and sorry for my total ignorance in
> >>>> this area but
> >>>> as I said this is not my area.
> >>>>
> >>>>
> >>>> Do you have some explation or advice to show me why my render is
> >>>> with this
> >>>> little white points?
> >>>>
> >>>>
> >>>> Thanks for everybody
> >>>>
> >>>>
> >>>
> >>> Do you talk about the white pixels on the table? Or you are talking
> >>> about the curves and circles on the printed board?
> >>>
> >>> On the tabble, it looks somewhat like a negative crand or stray, low
> >>> density, photons. It don't looks like it's a reflective surface, so, I
> >>> ruled out the reflection of a background.
> >>>
> >>> On the mother board:
> >>> It could be photons.
> >>> It could be a strange problem with the texture.
> >>>
> >>> Also, the texture on the top part of the metallic components is
> >>> suspicious.
> >>>
> >>> If your scene does have photons, try disabling it by commenting out the
> >>> protons block in the global_settings.
> >>>
> >>> Check if you have any #default texture anywhere in your scene.
> >>>
> >>> You use radiosity, try adjusting the parameters, the light and dark
> >>> molting on the connectors are not supposed to be there. Do you use an
> >>> HDR light probe? How did you used it? (sample code please)
> >>>
> >>>
> >>>
> >>>
> >>> Alain
> >>
> >> Hi,
> >> I've run into a similiar problem. I've managed to get everything
> >> working in
> >> povray 3.7, except that i get some weird white specks.
> >>
> >> These specks appear everywhere, but are most noticable on the main
> >> PCB. I've
> >> uploaded a small scene which produces these specks here:
> >> http://www.justgeek.de/stuff/povray/example.pov
> >> The hdr file (
> >> http://www.justgeek.de/stuff/povray/kitchen_probe_lat.hdr ) is
> >> from http://ict.debevec.org/~debevec/Probes/ converted to a lat / long
> >> format
> >> using HDRshop.
> >>
> >> I've played around with the radiosity settings, but i always get the
> >> white
> >> specks.
> >> An example can be found here:
> >> http://www.justgeek.de/stuff/povray/example-5-3.png (warning, due to
> >> the specks
> >> this is 2.5 MB big)
> >>
> >> As far as i can tell, i don't have any photons, i have used high quality
> >> settings and there is no texture used for the board. I can't imagine
> >> that it is
> >> a reflection from the surroundings.
> >>
> >> Has anyone got an idea what could cause this?
> >>
> >> Bye,
> >> NsN
> >>
> Was to quick :(
> The plane is not the problem, but, anyway, that plane is useless been
> under your table.
>
> The problem is the way you apply your light probe.
>
> Any image_map, by default, is maped to a 1x1 square, and tiled verticaly
> and horizontaly ad infinitum.
> Your environment sphere have a radius of 800, meaning that your probe is
> repeated 800 time from the equator to the pole, 1600 times from top to
> bottom, 1600 times from side to side.
>
> The speckling you see is due to that tiling that get reflected on every
> reflective surface.
> It also explain the circular nature of the speckling.
>
> The cure: Add map_type 1 just after the file's name.
>
> pigment{image_map{hdr "kitchen_probe_lat.hdr" map_type 1 interpolate 2}}
>
>
>
>
> Alain


Thank you that worked!

Thank you very much!
NsN

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