https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291824#M5267 <DIV class="actalk-migrated-content"><T>Hi!<BR /> Is there any relation between the strength of the luminance channel and the intensity of the light in terms of lumen?</T></DIV><BR /><span class="lia-inline-image-display-wrapper" image-alt="Cattura.PNG" style="width: 845px;"><img src="https://community.graphisoft.com/t5/image/serverpage/image-id/37120i5DA9E2819ECDAF0F/image-size/large?v=v2&amp;px=999" role="button" title="Cattura.PNG" alt="Cattura.PNG" /></span> Thu, 11 May 2023 11:51:01 GMT alemanda 2023-05-11T11:51:01Z https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291824#M5267 <DIV class="actalk-migrated-content"><T>Hi!<BR /> Is there any relation between the strength of the luminance channel and the intensity of the light in terms of lumen?</T></DIV><BR /><span class="lia-inline-image-display-wrapper" image-alt="Cattura.PNG" style="width: 845px;"><img src="https://community.graphisoft.com/t5/image/serverpage/image-id/37120i5DA9E2819ECDAF0F/image-size/large?v=v2&amp;px=999" role="button" title="Cattura.PNG" alt="Cattura.PNG" /></span> Thu, 11 May 2023 11:51:01 GMT https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291824#M5267 alemanda 2023-05-11T11:51:01Z https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291825#M5268 Surfaces only have a 'glow' sort of postproduction effect, they do not actually light up a scene, as far as I know.<BR /> <BR /> I tried faking a night scene with surface casting light, doesn't work that way, sadly. Mon, 13 Jun 2016 11:25:32 GMT https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291825#M5268 Erwin Edel 2016-06-13T11:25:32Z https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291826#M5269 Sorry ...<BR /> probably I made a mistake.<BR /> look at the attached picture.<BR /> I was referring to the surfaces producing lighting ... <BR /> I would need to know the relation between the value 100 (is expressed in percentage) and the lumen ... if any<BR /><IMG src="https://community.graphisoft.com/t5/image/serverpage/image-id/12446i576CD0D76076A212/image-size/large?v=v2&amp;px=999" border="0" alt="Cattura.PNG" title="Cattura.PNG" /> Mon, 13 Jun 2016 11:49:29 GMT https://community.graphisoft.com/t5/Visualization/luminance-material-and-lumen/m-p/291826#M5269 alemanda 2016-06-13T11:49:29Z