Problem whit glass material

[meekly]

This must be windshield,but you see that black things.

[manitwo]

first guess: turn normal-smoothing off.
hope this helps

[meekly]

first guess: turn normal-smoothing off.
hope this helps

Thanks,but not help

[meekly]

Here is the code:

<?xml version="1.0" encoding="utf-8"?>

<scene>
<renderer_settings>
<width>800</width>
<height>600</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>true</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.001</name>
<phong>
<diffuse>0.665 0.687 0.599</diffuse>
<specular>0.203 0.203 0.203</specular>
<fresnel_scale>0.800</fresnel_scale>
<exponent>300.000</exponent>
</phong>
</material>

<material>
<name>sf11.nk</name>
<specular>
<ior>1.200</ior>
<transparent>true</transparent>
<cauchy_b_coeff>0.000</cauchy_b_coeff>
<rgb_absorptivity>0.040 0.040 0.040</rgb_absorptivity>
</specular>
</material>

<skylight>
<sundir>0.016974 -0.983864 0.178112</sundir>
<turbidity>2.000000</turbidity>
<sky_gain>0.005000</sky_gain>
</skylight>

<camera>
<pos>8.203422 -2.141824 11.118270</pos>
<up>-0.005497 0.165100 0.986262</up>
<forwards>-0.032820 0.985715 -0.165191</forwards>
<aperture_radius>0.001000</aperture_radius>
<focus_distance>2.000000</focus_distance>
<aspect_ratio>1.33333</aspect_ratio>
<sensor_width>0.035000</sensor_width>
<lens_sensor_dist>0.038281</lens_sensor_dist>
<white_balance>E</white_balance>
</camera>

[CTZn]

I assume you applied the "sf11.nk" material to the surface. The ior doesn't match glass nor plastic or plexiglas, maybe you could try a value between 1.4 and 1.5 ? If that doesn't help, set an even lower absorptivity, maybe 0.00001 (depends on the scale of your object if I'm correct. Indigo spatial units are meters).

[meekly]

Carglass is tricky,
but here's the solution:

inorder to have a specular behave correct,
you must model a double sided mesh, and have
your normals facing out like in picture A.

just extrude your plane, and do a recalc normals outside (in blender).

Pic B shows the lens effect when using a single sided plane
Pic C shows to correct behaviour of light passing trough a double sided object.



Since carglass objects are bent (like a lens) they will show a lens effect if not double sided or if the normals are not facing outwards. (eg the interior of the car will be totally our of shape.)

Greetz,
Radiance

Thanks for this valued tutorial!I didnt know this things about lens!Its work !Thanks!