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Is there a way to make a sky_sphere show up in reflections but not in
the image? I want to create a render with alpha channel, but am not sure
how to hide the sky_sphere but still have it show up in reflections. Thanks.
Mike
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Mike Horvath <mik### [at] gmail com> wrote:
> Is there a way to make a sky_sphere show up in reflections but not in
> the image? I want to create a render with alpha channel, but am not sure
> how to hide the sky_sphere but still have it show up in reflections. Thanks.
>
>
> Mike
I'm assuming you've tried the standard no_image tag and it doesn't work with
sky_sphere?
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On 8/7/2018 4:28 PM, Bald Eagle wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>> Is there a way to make a sky_sphere show up in reflections but not in
>> the image? I want to create a render with alpha channel, but am not sure
>> how to hide the sky_sphere but still have it show up in reflections. Thanks.
>>
>>
>> Mike
>
> I'm assuming you've tried the standard no_image tag and it doesn't work with
> sky_sphere?
>
>
Correct.
Mike
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Le 07/08/2018 à 22:55, Mike Horvath a écrit :
> On 8/7/2018 4:28 PM, Bald Eagle wrote:
>> Mike Horvath <mik### [at] gmailcom> wrote:
>>> Is there a way to make a sky_sphere show up in reflections but not in
>>> the image? I want to create a render with alpha channel, but am not sure
>>> how to hide the sky_sphere but still have it show up in reflections.
>>> Thanks.
>>>
>>>
>>> Mike
>>
>> I'm assuming you've tried the standard no_image tag and it doesn't
>> work with
>> sky_sphere?
>>
>>
>
> Correct.
>
> Mike
What about the ancestor of the sky_sphere: a real sphere (0,1) scaled
large enough.
With no_image, later.
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On 8/7/2018 5:11 PM, Le_Forgeron wrote:
> What about the ancestor of the sky_sphere: a real sphere (0,1) scaled
> large enough.
>
> With no_image, later.
>
What about lighting? Should I set the emission to 1?
Mike
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On 8/7/2018 5:11 PM, Le_Forgeron wrote:
> What about the ancestor of the sky_sphere: a real sphere (0,1) scaled
> large enough.
>
> With no_image, later.
>
Okay, here is my new sphere:
//------------------------------------------------------------------------------
sphere
{
0, 1
pigment
{
gradient y
color_map
{
[0/4 color srgb (<0.6,0.7,1.0>+1)/2]
[3/4 color srgb (<0.0,0.1,0.8>+1)/2]
}
}
finish
{
diffuse 0
ambient 0
emission 1
reflection 0
}
scale 2048*16
no_image
}
//------------------------------------------------------------------------------
It works fine normally, *but* when I add focal blur, I can still see
stuff in the background. E.g.
//------------------------------------------------------------------------------
camera
{
orthographic
location -z * 4
direction +z * 4
up +y * 2
right +x * 2 * image_width/image_height
focal_point <0,0,0>
aperture 1/16
blur_samples 512
confidence 15/16
variance 1/256
}
//------------------------------------------------------------------------------
Is this a bug? Is there a workaround?
Mike
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Am 08.08.2018 um 00:16 schrieb Mike Horvath:
> It works fine normally, *but* when I add focal blur, I can still see
> stuff in the background. E.g.
...
> camera
> {
> orthographic
> location -z * 4
> direction +z * 4
> up +y * 2
> right +x * 2 * image_width/image_height
> focal_point <0,0,0>
> aperture 1/16
> blur_samples 512
> confidence 15/16
> variance 1/256
> }
...
> Is this a bug? Is there a workaround?
Apparently orthographic camera and focal blur don't mix well. What
you're seeing is (as far as I can tell) not the pseudo sky sphere /per
se/, but its reflection, blown up in /some/ manner I haven't had the
time & energy to analyze in more depth.
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On 8/8/2018 3:32 AM, clipka wrote:
> Am 08.08.2018 um 00:16 schrieb Mike Horvath:
>
>> It works fine normally, *but* when I add focal blur, I can still see
>> stuff in the background. E.g.
> ...
>> camera
>> {
>> orthographic
>> location -z * 4
>> direction +z * 4
>> up +y * 2
>> right +x * 2 * image_width/image_height
>> focal_point <0,0,0>
>> aperture 1/16
>> blur_samples 512
>> confidence 15/16
>> variance 1/256
>> }
> ...
>> Is this a bug? Is there a workaround?
>
> Apparently orthographic camera and focal blur don't mix well. What
> you're seeing is (as far as I can tell) not the pseudo sky sphere /per
> se/, but its reflection, blown up in /some/ manner I haven't had the
> time & energy to analyze in more depth.
>
Is there another way besides focal blur to eliminate the moire patterns
on the ground plane toward the horizon?
Mike
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Am 08.08.2018 um 16:03 schrieb Mike Horvath:
> Is there another way besides focal blur to eliminate the moire patterns
> on the ground plane toward the horizon?
UberPOV's anti-aliasing mode 3 would do the trick.
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Mike Horvath <mik### [at] gmailcom> wrote:
> On 8/7/2018 5:11 PM, Le_Forgeron wrote:
> > What about the ancestor of the sky_sphere: a real sphere (0,1) scaled
> > large enough.
> >
> > With no_image, later.
> >
>
> Okay, here is my new sphere:
>
>
> //------------------------------------------------------------------------------
> sphere
> {
> 0, 1
> pigment
> {
> gradient y
> color_map
> {
> [0/4 color srgb (<0.6,0.7,1.0>+1)/2]
> [3/4 color srgb (<0.0,0.1,0.8>+1)/2]
> }
> }
> finish
> {
> diffuse 0
> ambient 0
> emission 1
> reflection 0
> }
> scale 2048*16
> no_image
> }
> //------------------------------------------------------------------------------
>
>
> It works fine normally, *but* when I add focal blur, I can still see
> stuff in the background. E.g.
>
>
> //------------------------------------------------------------------------------
> camera
> {
> orthographic
> location -z * 4
> direction +z * 4
> up +y * 2
> right +x * 2 * image_width/image_height
> focal_point <0,0,0>
> aperture 1/16
> blur_samples 512
> confidence 15/16
> variance 1/256
> }
> //------------------------------------------------------------------------------
>
>
> Is this a bug? Is there a workaround?
>
>
> Mike
Just a guess but would hollow in the sky sphere help.
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