|
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Is there a standard way to create a photo studio-like background (e.g.,
https://i.ebayimg.com/images/g/KxwAAOSwzvlW-6Kv/s-l1600.jpg)
It is the combination of two planes as an object shadow drops on them depending
on the distance.
I tried to make one by merging two perpendicular planes (to eliminate the
horizon line), but wasn't successful.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Kima" <nomail@nomail> wrote:
> I tried to make one by merging two perpendicular planes (to eliminate the
> horizon line), but wasn't successful.
You could use a bezier patch, a polynomial, blobbing together two planes
http://news.povray.org/povray.binaries.images/thread/%3Cweb.5cf31c5f43128c364eec112d0%40news.povray.org%3E/
doing an interpolation between two planes,
http://news.povray.org/povray.binaries.images/thread/%3Cweb.5d4b7ce3a683fa3a4eec112d0%40news.povray.org%3E/
or just use a curved function for an isosurface:
#version 3.8;
global_settings {assumed_gamma 1.0 }
#include "colors.inc"
#include "functions.inc"
#include "math.inc"
camera {
//location <0, 0, -2.5>
location <0, 5, -10>
right x*image_width/image_height
up y
look_at <0, 2, 0>
//look_at <0, 0, 0.01>
}
light_source {<10, 10, -10> rgb 1}
background {Gray10}
#declare Tan = texture {pigment {rgb <0.92, 0.60, 0.20>} finish {diffuse 0.7
specular 0.2 reflection 0.02}}
isosurface {
function {y-1/z}
open
threshold 0
#declare Gradient = 1000;
#declare Min_factor= 0.6;
max_gradient Gradient
//evaluate Gradient*Min_factor, sqrt(Gradient/(Gradient*Min_factor)), min
(0.7, 1.0)
accuracy 0.01
contained_by {box {<-3, 0, 0.0000001>, <3, 5, 5>}}
//all_intersections
polarity off
interior_texture {Tan} texture {Tan}
rotate y*180
scale 1
//translate -x*10
}
Post a reply to this message
|
|
| |
| |
|
|
From: Thomas de Groot
Subject: Re: How to create a studio-like background?
Date: 22 Aug 2019 02:26:52
Message: <5d5e35ac@news.povray.org>
|
|
|
| |
| |
|
|
A very, very basic solution would be to make a union of very thin boxes
(horizontal and vertical) joined by a quarter section of a horizontal
cylindrical sheet with identical thickness (difference between two
cylinders). You will be able to follow that up I am sure ;-)
--
Thomas
Post a reply to this message
|
|
| |
| |
|
|
From: William F Pokorny
Subject: Re: How to create a studio-like background?
Date: 22 Aug 2019 04:56:51
Message: <5d5e58d3$1@news.povray.org>
|
|
|
| |
| |
|
|
On 8/21/19 12:36 PM, Kima wrote:
> Is there a standard way to create a photo studio-like background (e.g.,
> https://i.ebayimg.com/images/g/KxwAAOSwzvlW-6Kv/s-l1600.jpg)
>
...
>
Not sure about a standard way, but as have several others, Tek created a
studio set up back in 2006 I've used. See:
http://news.povray.org/povray.binaries.scene-files/thread/%3C453d41ff%241%40news.povray.org%3E/
He posted a sample image too at the time to p.b.i.
Bill P.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Op 22/08/2019 om 10:56 schreef William F Pokorny:
> On 8/21/19 12:36 PM, Kima wrote:
>> Is there a standard way to create a photo studio-like background (e.g.,
>> https://i.ebayimg.com/images/g/KxwAAOSwzvlW-6Kv/s-l1600.jpg)
>>
> ...
>>
>
> Not sure about a standard way, but as have several others, Tek created a
> studio set up back in 2006 I've used. See:
>
>
http://news.povray.org/povray.binaries.scene-files/thread/%3C453d41ff%241%40news.povray.org%3E/
>
>
> He posted a sample image too at the time to p.b.i.
>
> Bill P.
Now that you mention this, there is also Jaime Vives Piqueres:
http://www.ignorancia.org/index.php/technical/tools-objects/studio-lighting-kit/
--
Thomas
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Le 19-08-21 à 12:36, Kima a écrit :
> Is there a standard way to create a photo studio-like background (e.g.,
> https://i.ebayimg.com/images/g/KxwAAOSwzvlW-6Kv/s-l1600.jpg)
>
> It is the combination of two planes as an object shadow drops on them depending
> on the distance.
>
> I tried to make one by merging two perpendicular planes (to eliminate the
> horizon line), but wasn't successful.
>
>
Using merge does nothing to the line where the planes intersect. All it
does is to suppress the surfaces that are inside the planes.
You can place a clipped cylinder to smooth it out.
union{
plane{x, -1}
plane{-z, -1}
cylinder{1001*x, -1001*x, 1
clipped_by box{<1000,0,0><-1000,-1,-1> inverse}
}
}
Adjust the radius of the cylinder, the clipping box and location of the
planes to suit your need.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
|
|