About area lighting - AccuRender nXt2024-03-29T02:07:38Zhttp://accurender.ning.com/forum/topics/about-area-lighting?feed=yes&xn_auth=noThanks a lot Roy. I understan…tag:accurender.ning.com,2012-05-23:6293855:Comment:685592012-05-23T20:03:45.219ZMarc Chaumierhttp://accurender.ning.com/profile/MarcChaumier
<p>Thanks a lot Roy. I understand, now, why the light is stronger in the space between two surfaces (close enough) tagged as omni, but not in the case of the area light.</p>
<p>Thanks a lot Roy. I understand, now, why the light is stronger in the space between two surfaces (close enough) tagged as omni, but not in the case of the area light.</p> The omni light distributes li…tag:accurender.ning.com,2012-05-23:6293855:Comment:685582012-05-23T14:48:33.985ZRoy Hirshkowitzhttp://accurender.ning.com/profile/RoyHirshkowitz
<p>The omni light distributes light equally in all directions.</p>
<p>The area light distributes light based on its direction vector (straight down by default-- but an editable setting). The light is only distributed in one hemisphere and the intensity decreases at glancing angles using the cosine with respect to the direction vector.</p>
<p>The omni light distributes light equally in all directions.</p>
<p>The area light distributes light based on its direction vector (straight down by default-- but an editable setting). The light is only distributed in one hemisphere and the intensity decreases at glancing angles using the cosine with respect to the direction vector.</p> Thanks Mario. I see, with you…tag:accurender.ning.com,2012-05-23:6293855:Comment:685572012-05-23T11:57:07.316ZMarc Chaumierhttp://accurender.ning.com/profile/MarcChaumier
<p>Thanks Mario. I see, with your help, that omni light are better for this case. And my question to Roy: Why? What is the difference in the functioning betwen area or diffuse, and omni? The "area" picture is not finalized, but its enough to see the difference...…<a href="http://storage.ning.com/topology/rest/1.0/file/get/55259903?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/55259903?profile=RESIZE_1024x1024" width="721"></img></a></p>
<p>Thanks Mario. I see, with your help, that omni light are better for this case. And my question to Roy: Why? What is the difference in the functioning betwen area or diffuse, and omni? The "area" picture is not finalized, but its enough to see the difference...<a href="http://storage.ning.com/topology/rest/1.0/file/get/55259903?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55259903?profile=RESIZE_1024x1024" width="721" class="align-full"/></a></p> Thanks Mario, the illuminatio…tag:accurender.ning.com,2012-05-15:6293855:Comment:678982012-05-15T15:51:23.594ZMarc Chaumierhttp://accurender.ning.com/profile/MarcChaumier
<p>Thanks Mario, the illumination looks very good. I'm going to take a look on your file. Thanks for the time you spend on it.</p>
<p>Thanks Mario, the illumination looks very good. I'm going to take a look on your file. Thanks for the time you spend on it.</p> No-- don't tag it as thin. …tag:accurender.ning.com,2012-05-14:6293855:Comment:681122012-05-14T18:01:12.306ZRoy Hirshkowitzhttp://accurender.ning.com/profile/RoyHirshkowitz
<p>No-- don't tag it as thin. </p>
<p>I increased the distance between the sources and the screen for this one. It also uses e4 plus a tiny bit of glow to simulate the sub-surface scattering of the material which we are not going to calculate (it would take forever). You won't be able to use e4 for yours yet, I had to make some changes here since the glow isn't working.</p>
<p>Put the glow in a separate channel so you can easily adjust it. Don't get carried away with it, it is…</p>
<p>No-- don't tag it as thin. </p>
<p>I increased the distance between the sources and the screen for this one. It also uses e4 plus a tiny bit of glow to simulate the sub-surface scattering of the material which we are not going to calculate (it would take forever). You won't be able to use e4 for yours yet, I had to make some changes here since the glow isn't working.</p>
<p>Put the glow in a separate channel so you can easily adjust it. Don't get carried away with it, it is "cheating".</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/55259782?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/55259782?profile=original" width="708" class="align-full"/></a></p> Thanks a lot Roy. When I offs…tag:accurender.ning.com,2012-05-14:6293855:Comment:678862012-05-14T17:48:42.892ZMarc Chaumierhttp://accurender.ning.com/profile/MarcChaumier
<p>Thanks a lot Roy. When I offset the surface, is it to simulate a solid, so do I have to tag the both as "thin", or not? The effect that my customer is looking for, is the case of the bigs disks at the ceiling. Something like this picture, but with the better lighting effect that you obtain.…<a href="http://storage.ning.com/topology/rest/1.0/file/get/55259807?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/55259807?profile=RESIZE_1024x1024" width="721"></img></a></p>
<p>Thanks a lot Roy. When I offset the surface, is it to simulate a solid, so do I have to tag the both as "thin", or not? The effect that my customer is looking for, is the case of the bigs disks at the ceiling. Something like this picture, but with the better lighting effect that you obtain.<a href="http://storage.ning.com/topology/rest/1.0/file/get/55259807?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55259807?profile=RESIZE_1024x1024" width="721" class="align-full"/></a> </p> Not really, no-- but you can…tag:accurender.ning.com,2012-05-14:6293855:Comment:680832012-05-14T16:52:28.698ZRoy Hirshkowitzhttp://accurender.ning.com/profile/RoyHirshkowitz
<p>Not really, no-- but you can change the shape and configuration of the light sources behind the screen. I did these quickly for illustration only. I also only let this run for a minute or so-- things should smooth out a bit after a while.</p>
<p>Not really, no-- but you can change the shape and configuration of the light sources behind the screen. I did these quickly for illustration only. I also only let this run for a minute or so-- things should smooth out a bit after a while.</p> roughness is set to maximum i…tag:accurender.ning.com,2012-05-14:6293855:Comment:678832012-05-14T16:45:13.918ZJan Verzelenhttp://accurender.ning.com/profile/janverzelen
<p>roughness is set to maximum i see, is there a way to make the material more diffuse? Maybe changing the distance between light source and screen or is there no place left? Is there any change by tagging the lights as omnidirectional or diffuse?</p>
<p>roughness is set to maximum i see, is there a way to make the material more diffuse? Maybe changing the distance between light source and screen or is there no place left? Is there any change by tagging the lights as omnidirectional or diffuse?</p> Put 6 smaller light sources…tag:accurender.ning.com,2012-05-14:6293855:Comment:678822012-05-14T16:17:10.629ZRoy Hirshkowitzhttp://accurender.ning.com/profile/RoyHirshkowitz
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/55259809?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/55259809?profile=original" width="708"></img></a></p>
<p>Put 6 smaller light sources behind the screen. Gave the screen some thickness for better refraction by copying and offseting the surface. Changed the screen material a little-- IOR 1.6, Roughness 1.0, Transparency .85, -- <em>no glow</em>. Until you're convinced that you can't adequately model this physically, avoid all tricks such as glow or those that Mario is…</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/55259809?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/55259809?profile=original" width="708" class="align-full"/></a></p>
<p>Put 6 smaller light sources behind the screen. Gave the screen some thickness for better refraction by copying and offseting the surface. Changed the screen material a little-- IOR 1.6, Roughness 1.0, Transparency .85, -- <em>no glow</em>. Until you're convinced that you can't adequately model this physically, avoid all tricks such as glow or those that Mario is suggesting.</p>
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<p>e1, BTW. This stuff isn't working well with e4-- I need to make some changes here.</p> Thanks Mario, for your advice…tag:accurender.ning.com,2012-05-14:6293855:Comment:678802012-05-14T16:01:37.318ZMarc Chaumierhttp://accurender.ning.com/profile/MarcChaumier
<p>Thanks Mario, for your advices, I'll try all these way. I'll post the result.</p>
<p>Thanks Mario, for your advices, I'll try all these way. I'll post the result.</p>