|
|
On 14-10-2018 19:25, Stephen wrote:
> On 14/10/2018 16:55, Alain wrote:
>> Le 18-10-13 à 15:04, Stephen a écrit :
>>> For testing your TV material. Create a sphere with a no image flag.
>>> This will allow the reflections of the sphere to be shown in the
>>> reflections of your TV. Convert a HDRi to a png and create a material
>>> using this and attach it to the sphere. The reflections should show up.
>>> Aside, some HDR images are in a cruciform format which should be used
>>> with a box not a sphere.
>>>
>>> You can download some HDRIs from here:
>>> https://hdrihaven.com/hdris/category/?c=all
>>>
>>>
>>
>> There is no need to convert the HDRI to any other format as HDRI is
>> directly supported in version 3.7 and later. You can use *.HDR or
>> *.EXR files.
>>
>> For a rectangular longitude-latitude image :
>> sphere{0 Radius pigment{image_map{ hdr "Name.hrd" map_type 1
>> interpolate 1} scale <-1,1,1>}finish{diffuse 0 emission 1}}
>>
>> The scale is to flip the image so that it show in the correct
>> direction from the inside of the sphere.
>> Some probes may be to bright or dim. Adjust emission to get correct
>> results.
>>
>>
>
>
> Of course you are right. I am still, mostly, using Pov ver 3.62 SDL.
> I really look forward to the news before the end of the year. :)
>
> Apologies to David but the point still stands. Radiosity is a subject in
> itself and takes time. In my opinion.
>
One can diverge on this though ;-) In most if not all of my scenes, I
have radiosity switched on from the start, and I rarely change the
settings, with the exception of recursion_limit, media, and normal,
which I adapt to the needs specific of my scene. See a sample xode
example below (watch out for line breaks when copying):
radiosity {
pretrace_start 0.08 // start pretrace at this size
pretrace_end 0.004 // end pretrace at this size
count 50, 1000 // higher -> higher quality (1..1600)
[35]
nearest_count 10, 5 // higher -> higher quality (1..10) [5]
error_bound 1 // higher -> smoother, less accurate
[1.8]
recursion_limit 2 // how much interreflections are
calculated (1..5+) [2]
low_error_factor .3 // reduce error_bound during last
pretrace step
gray_threshold 0.0 // increase for weakening colors
(0..1) [0]
minimum_reuse 0.015 // reuse of old radiosity samples [0.015]
maximum_reuse 0.1 brightness 1 //
brightness of radiosity effects (0..1) [1]
adc_bailout 0.01/2
normal off // take surface normals into account [off]
media off // take media into account [off]
always_sample off // turn sampling in final trace off [on]
//max_sample 1.0 // maximum brightness of samples
}
--
Thomas
Post a reply to this message
|
|