https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8514833#M7671 <P>Well from your screenshot, if you are using VRay render, you should use VRay materials, any other material will not assure that all VRay features will reflect correctly.</P> <P>Having said that, I prep a quick scene and everything work as it should, you need to use a direct light or VRay sun to create caustics, if you are using VRay sun be sure to focus the Photon emitting radius to the geometry that will be emitting&nbsp;caustics.</P> <P>Then just play with the Caustic values, usually, fewer photons will create sharper caustics. They lose shape but they are more visible.</P> <P>Hope this help.</P> <P>&nbsp;</P> Thu, 10 Jan 2019 23:23:51 GMT Francisco_Penaloza 2019-01-10T23:23:51Z https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8499904#M7668 <P>Hello everyone. I need to reflect light from one object to another. I tried caustic (Vray) but it is not working for me (maybe my fault). Maybe someone know some tutorials or practics how to done with this?<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Light reflection.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/587104iEF2E0A7EA463C0FA/image-size/large?v=v2&amp;px=999" role="button" title="Light reflection.png" alt="Light reflection.png" /></span></P> Fri, 04 Jan 2019 06:49:07 GMT https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8499904#M7668 Anonymous 2019-01-04T06:49:07Z https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8505992#M7669 <P>Can you explain a little more what are you trying to achieve?&nbsp;&nbsp;</P> <P>By Default, GI should help you with this, also caustics but this will depend on what type of materials are in your scene.</P> <P>Again if you could screenshot the setup of your scene and settings to have a better understanding of your problem.</P> <P>&nbsp;</P> <P>&nbsp;</P> Mon, 07 Jan 2019 22:15:14 GMT https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8505992#M7669 Francisco_Penaloza 2019-01-07T22:15:14Z https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8506945#M7670 <P>I enabled&nbsp;&nbsp;caustics in GI and it does not work. A try to make light bounce from mirror like object with this material.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image.png" style="width: 675px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/588394iCBD0964330114147/image-size/large?v=v2&amp;px=999" role="button" title="image.png" alt="image.png" /></span></P> Tue, 08 Jan 2019 11:24:53 GMT https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8506945#M7670 Anonymous 2019-01-08T11:24:53Z https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8514833#M7671 <P>Well from your screenshot, if you are using VRay render, you should use VRay materials, any other material will not assure that all VRay features will reflect correctly.</P> <P>Having said that, I prep a quick scene and everything work as it should, you need to use a direct light or VRay sun to create caustics, if you are using VRay sun be sure to focus the Photon emitting radius to the geometry that will be emitting&nbsp;caustics.</P> <P>Then just play with the Caustic values, usually, fewer photons will create sharper caustics. They lose shape but they are more visible.</P> <P>Hope this help.</P> <P>&nbsp;</P> Thu, 10 Jan 2019 23:23:51 GMT https://forums.autodesk.com/t5/3ds-max-shading-lighting-and/reflection-of-light-from-an-object-to-object/m-p/8514833#M7671 Francisco_Penaloza 2019-01-10T23:23:51Z