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What governs the black screen of death?

Posted: Mon Jan 29, 2007 8:57 am
by matsta
tsup guys!

i just started with exporting to indigo today. i must say that some of the renders in the galleries do excite me. all my files and scripts were extracted correctly and everything is in the right place file wise.

i create a new scene in blender (i am moderatly experienced with blender) containing suzzane and a cube on a plane. the cube is spec 0 (ie matte) and the monkey is set transparent with subsurf 2 applied and set smooth. my light is a sun (as in tutorial) and all my settings are exactly the same as in the main ttorial (which i founf n the indigo site). but sometimes my render ill render for like 20 minutes and come up with nothing but black... but others. will render the cube and monkey but the plane will be pure black (no shading)

does anyone have any idea as to what could eb happening? i can post images if needs be? what governs weather or not the image renders... im boggled.

thanks
mat

Posted: Mon Jan 29, 2007 4:09 pm
by Kachu
What version of Indigo and What exporter?
In most of the blender exporters there is a tab where you select the 'Env Type' it should be set to Physical Sky.

Env Types; (This could be talked about somewhere(and post if something is wrong))
- Physical Sky is the sun like in the tutorial
- Background color is illuminated by the background color
- Texture map is for .exr HDR illuminated scenes (search the forum for exr to see what it does)

On .63beta4 its under the environment tab.

Posted: Mon Jan 29, 2007 8:18 pm
by Zom-B
Welcome to Indigo Dude :)

In Indigo the Models just get illuminated probably on the side the normals faces out, check them.

black

Posted: Mon Jan 29, 2007 8:35 pm
by BWETIK
pure black plane is maybe problem with material, if you have a ray transparency or ray mirror activated, it can showing like black..
And maybe its something another :wink:

Posted: Tue Jan 30, 2007 3:31 am
by matsta
thanks guys got the problem sorted ;) man this forum is way to friedly :)

Posted: Tue Jan 30, 2007 3:34 am
by matsta
thanks guys this forum is way to friendly ;)

Posted: Wed Jan 31, 2007 2:57 am
by matsta
ok guys.... still no luck. everything u advized i did.flipped normals. change mirror settings. stuff like that. still nothing. here is a screenin of what im dealing with. i have no idea wtf is going on. i did the office scene test render last nite with 3 machines running and that went good. so dont know wat the prob is... any ideas?

Image

Posted: Wed Jan 31, 2007 4:13 am
by manitwo
coul you post the xml-code?

Posted: Wed Jan 31, 2007 5:18 am
by matsta
manitwo wrote:coul you post the xml-code?
<scene>
<renderer_settings>
<width>1280</width>
<height>1024</height>
<metropolis>true</metropolis>
<large_mutation_prob>0.1</large_mutation_prob>
<max_change>0.02</max_change>
<max_num_consec_rejections>100</max_num_consec_rejections>
<bidirectional>false</bidirectional>
<russian_roulette_live_prob>0.7</russian_roulette_live_prob>
<max_depth>1000</max_depth>
<strata_width>14</strata_width>
<logging>false</logging>
<save_untonemapped_exr>false</save_untonemapped_exr>
<save_tonemapped_exr>false</save_tonemapped_exr>
</renderer_settings>

<tonemapping>
<!--
<linear>
<scale>1.0</scale>
</linear>
-->
<reinhard>
<pre_scale>1.000000</pre_scale>
<post_scale>1.000000</post_scale>
<burn>0.800</burn>
</reinhard>
</tonemapping>

<material>
<name>Default</name>
<diffuse>
<colour>1 1 1</colour>
</diffuse>
</material>
<material>
<name>Material</name>
<diffuse>
<colour>0.058 0.365 0.009</colour>
</diffuse>
</material>

<material>
<name>Material.001</name>
<specular>
<normal_reflectance>0.000</normal_reflectance>
<ior>2.634</ior>
<transparent>true</transparent>
<cauchy_b_coeff>0.000</cauchy_b_coeff>
<rgb_absorptivity>0.000 0.000 0.000</rgb_absorptivity>
</specular>
</material>

<skylight>
<sundir>0.227688 -0.684177 0.692863</sundir>
<turbidity>2.000000</turbidity>
<sky_gain>0.005000</sky_gain>
</skylight>

<camera>
<pos>4.150859 -1.529263 2.289482</pos>
<up>-0.365636 0.295516 0.882599</up>
<forwards>-0.811632 0.362927 -0.457753</forwards>
<aperture_radius>0.001000</aperture_radius>
<focus_distance>2.000000</focus_distance>
<aspect_ratio>1.25</aspect_ratio>
<sensor_width>0.035000</sensor_width>
<lens_sensor_dist>0.038281</lens_sensor_dist>
<white_balance>E</white_balance>
</camera>

not sure if that is what u want? im new at this

mat

Posted: Wed Jan 31, 2007 5:19 am
by matsta
i have found a solution. but its very unsatisfactory and that is to us the top of a cube instead of a plane. that seems to work fine. not to sure what the difference is

lol its probably soemthing seriously simpl and im just to noob to figure it out

mat

Posted: Wed Jan 31, 2007 11:34 am
by Kosmokrator
i thik this material is totaly black and difuse.....

<material>
<name>Material.001</name>
<specular>
<normal_reflectance>0.000</normal_reflectance>
<ior>2.634</ior>
<transparent>true</transparent>
<cauchy_b_coeff>0.000</cauchy_b_coeff>
<rgb_absorptivity>0.000 0.000 0.000</rgb_absorptivity>
</specular>
</material>

thats the reason........

Posted: Wed Jan 31, 2007 2:48 pm
by manitwo
matsta wrote:not sure if that is what u want?
yes exactly.

kosmo is right ... Material.001 is really weird (i guess that's the ground-mat, or?) - try a diffuse mat like:

Code: Select all

    <material>
        <name>Material.001</name>
        <diffuse>
            <colour>0.3 0.6 0.8</colour>
        </diffuse>
    </material>