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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Nov 18 10:25 pm)



Subject: Real-time conversion of Panoramic images to Angular Map in Poser


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ice-boy ( ) posted Thu, 21 May 2009 at 2:33 PM

Quote - Switched to the head texture with hair.
Changed the SSS colors - less saturated and slightly darker.
Lowered the specular from .25 to .2.
Added the bump map at .05.

i know its old but do you remember if you used here an IBL plus the blury specular image in the shader? or only the panorama in the shader? 


bagginsbill ( ) posted Thu, 21 May 2009 at 2:37 PM

file_431248.jpg

Maybe it is 4 / Roughness. I actually rendered a couple with 5 and they didn't match, but the preview did match. With 4, the render matches but not the preview.

Wierd.


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bagginsbill ( ) posted Thu, 21 May 2009 at 2:38 PM

file_431249.jpg

See here with 5 it doesn't match in render.

Notice also i changed the left/right blend from U node to N node. My prop doesn't always have U lined up where I think it is, but left side versus right side is always correct.


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bagginsbill ( ) posted Thu, 21 May 2009 at 2:48 PM

Quote - i know its old but do you remember if you used here an IBL plus the blury specular image in the shader? or only the panorama in the shader? 

 
IBL plus the blury specular image in the shader. The IBL was using my shader on the IBL that converts lat/long panorama to angular map on the fly. I did not use the panorama in the skin shader for diffuse. The skin shader was ordinary diffusse node plus the Sphere_Map(lat/long panorama) to simulate soft specular reflections from the environment only. The diffuse part came from the IBL.


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ice-boy ( ) posted Thu, 21 May 2009 at 2:51 PM

interesting.

but i think tis close enough for a panorama blury image. this really helped me. thanks. no i onl need to find out how to use this in the skin shader.


ice-boy ( ) posted Thu, 21 May 2009 at 3:09 PM

file_431252.jpg

test with a simple GC material . here is without a panorama specular


ice-boy ( ) posted Thu, 21 May 2009 at 3:09 PM

file_431253.jpg

with extra specular in the shader


ice-boy ( ) posted Thu, 21 May 2009 at 3:11 PM

i used a panorama image for specular. intensity was 0,22.

i added an extra specular light above hes body to get some specular from the sky. intensity was 10 %. i got some specular in the shadow next to hes neck. but it of course made everything brighter.

i am not happy with the results. but i see a lot of potential in this. 


ice-boy ( ) posted Thu, 21 May 2009 at 3:14 PM · edited Thu, 21 May 2009 at 3:15 PM

i also used a very high number for the phong in HDRshop. its not the same like the specular on the skin. its little to glossy.

and it was not a HDR image. just a normal image.


bagginsbill ( ) posted Thu, 21 May 2009 at 4:06 PM · edited Thu, 21 May 2009 at 4:08 PM

file_431258.jpg

I just tried a different way, just for grins.

I put a ordinary Reflection and a small Noise bump on a sphere and render it big - 4K by 4K - because when you try this at normal scale it is too grainy. Then I reduced by 10x to 400 by 400.

Still not good enough.

How do other renderers do this so easily? Why is blurred reflection a hard thing for Poser to do? Drives me crazy.

All the soft ray-traced effects in Poser are grainy - very frustrating.


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ice-boy ( ) posted Thu, 21 May 2009 at 4:16 PM

Quote - I just tried a different way, just for grins.

I put a ordinary Reflection and a small Noise bump on a sphere and render it big - 4K by 4K - because when you try this at normal scale it is too grainy. Then I reduced by 10x to 400 by 400.

Still not good enough.
**
How do other renderers do this so easily? Why is blurred reflection a hard thing for Poser to do? Drives me crazy.**

All the soft ray-traced effects in Poser are grainy - very frustrating.

soft reflection is hard in every 3d software.

did you watch Iron Man last summer? the material on the suit was very blurry. ILM said that it was very hard to find a solution. we need ot understand that they render for animation. so if one frame takes 48 hours then they have a problem. PIXAR realesed brickmaps for renderman. ILM used brickmaps. 
graphics.pixar.com/library/SoftReflections/paper.pdf

i was reading Blender also has a solution for faster rendering of blurry reflection.

but raytracing for skin i no an option in Poser. it takes to long to render for a subtle effect


ice-boy ( ) posted Thu, 21 May 2009 at 4:19 PM

when i have specular on skin plus the panorama image it also doesnt work very good together. i need a light with specular to show up the panorama image.so then i have two specular effect.s one from the ligt and from teh reflection map.
if i dont have it connected to the blinn then i wont have shadows so specular will be everywhere.
if we connect it  with the diffuse node then it will not work good with an IBL.

there must be a way grrrrrrrrrrrrrrrrrrrrrrrrrrrr


bagginsbill ( ) posted Thu, 21 May 2009 at 5:46 PM

I just thought of a way, but it is rather limited.

Suppose you do not include an environment sphere. Set up a Reflect node with a bright impossible hyper-white as the background color - plug a number into it like 10.

Now when the reflect node sees nothing in 3D it will return 10 * white. If it does see something, it will return the color of that thing which will not be so bright.

Plug this Reflect node into a Math:Subtract node, and subtract 9 from it. Thus it is 1 when no 3D object is reflected, and much less than 0 when something is reflected.

Now you have a value you can run into a Blender node, in the Blending Value.

Connect your Sphere_Map to Value_2 of the blender. Set the Blender Value_1 to black. This is your environmental reflection, blocked by local 3D objects.


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bagginsbill ( ) posted Thu, 21 May 2009 at 5:53 PM

Nah - that's no good either. The blocked reflection will have a hard edge. Needs to be soft.


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ice-boy ( ) posted Fri, 22 May 2009 at 1:52 AM

yes. i made  a shader like that but then the arm reflection is very hard.

but you know what? now that i think i about it why even bother since IBL's are also not perfect? IBL is good for some fast global lighting. and it looks good with AO. but the light is  still without shadows. for example if in the IBL there is a bright light on the left then this means that boths arms will look the same. both arms will be lit from the left.

i think 3dsmax and maya have final gather for this. they make softshadows  with HDR's.


ice-boy ( ) posted Fri, 22 May 2009 at 7:52 AM

if i just add the panorama pic on top of it  it makes everything brighter. i used 0,2.

what if we use the fresnel effect combined with the blinn node? i dont mean the fresnel effect like its on the blinn node. but like on  a reflective material.

so lets say we use around the edge something like 0,2 plus where the light is coming . so we would get  where the light is coming plus on the edge. and that way we would get specular in the shadow.


ice-boy ( ) posted Fri, 22 May 2009 at 12:17 PM

look what i found here. very interesting. what do you think
www.zbrushcentral.com/zbc/showthread.php


bagginsbill ( ) posted Fri, 22 May 2009 at 12:30 PM

I've seen that before, and if you're doing a very black shiny man with a very bump skin, it's great. All you need is an ordinary reflect node and the environment sphere. That guy is SHINY.

But a normal everyday human - no way. You have to have softer reflections.


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ice-boy ( ) posted Fri, 22 May 2009 at 12:32 PM

yeah i agree.


ice-boy ( ) posted Fri, 22 May 2009 at 2:16 PM

file_431328.jpg

this is a window panorama i made.


ice-boy ( ) posted Fri, 22 May 2009 at 2:17 PM

file_431329.jpg

here i used Diffuse/Specular Convolution 7


ice-boy ( ) posted Fri, 22 May 2009 at 2:56 PM

file_431335.jpg

ok this is the workflow i am experimenting. lets say for example that we want an area light. so light coming from the window. its not only soft diffuse but it has also soft specular. we can not cahane this in the material room. so the first thing i do is set my lighting. i experiment. i dont concetrate on the specular very much.

then i try to match a plane object with my lighting.  like here.


ice-boy ( ) posted Fri, 22 May 2009 at 2:59 PM · edited Fri, 22 May 2009 at 3:01 PM

file_431336.jpg

then i make the figure invisible. i load BB's GenIBL and basicly render out a Light probe. then in HDRshop i make a Latitude/Longitude . this is now my reflection specular. i load this now in teh shader and it should somehow match with the light.  


ice-boy ( ) posted Fri, 22 May 2009 at 3:03 PM

file_431337.jpg

this is now the specular from the reflection map. i made it green so that you can see it better. what do you think?

its not perfect.i for example can nto use it for the blue sky. if i add a light above my figure i will also get the white specular from the Blinn .


ice-boy ( ) posted Fri, 22 May 2009 at 3:06 PM

maybe if i turn off the extra specular in the shader and only use the Blinn as a matte for the reflection map. then i would basiclly do every specular from the reflection map. then i could use an extra specular-only light above the figure and i wouldnt get extra white specular.

the downside is that i couldnt move the lights after the reflection map is loaded.


ice-boy ( ) posted Sat, 23 May 2009 at 5:43 AM

you know  with some tweaking we could also use this for glosy reflections on the eyes.


ice-boy ( ) posted Sat, 23 May 2009 at 6:11 AM · edited Sat, 23 May 2009 at 6:21 AM

i tested this now and it works. not physical realistic but could be used for faster rendering.
the process is the same. you first position what you want to be reflected n the eyes. then you load BB's GenIBL  and render it out. then in HDRshopt you make a reflection image.

you need only Poser,GenIBL and HDRshop. everthing is free. and it takes 10 - 20 minutes.

i see noone giving an opinion. is it not good? 


ice-boy ( ) posted Sat, 23 May 2009 at 6:11 AM

file_431382.jpg


ice-boy ( ) posted Sat, 23 May 2009 at 6:11 AM

file_431383.jpg


Anthanasius ( ) posted Mon, 25 May 2009 at 11:37 AM

Strange i've already seen that somewhere here ... :biggrin:

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ice-boy ( ) posted Mon, 25 May 2009 at 11:52 AM · edited Mon, 25 May 2009 at 11:58 AM

you gave me the idea. remember? in the reflection thread about the eyes?

i am showing it now how i do it.


ice-boy ( ) posted Mon, 25 May 2009 at 12:58 PM

file_431515.jpg

new test. what do you think? what is wrong with the render?


Anthanasius ( ) posted Mon, 25 May 2009 at 4:50 PM

IMHO he look a little "metalic"

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ice-boy ( ) posted Tue, 26 May 2009 at 2:39 AM

yeah something is not right.

i used a reflection map from clouds. so the light is scattered and the specular is blurry. will try again.


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