you do need to, select color, adjust 'opacity', apply color then re-adjust and re-apply to see changes [image: 2Fsl_opacity_Mac.png]

Hi, There are some tutorials on Dave´s blog: http://www.finewoodworking.com/item/31103/sketchup-8-pro-a-look-at-some-of-the-solid-tools And on YouTube too: http://www.youtube.com/watch?v=TAS1EVOvDMo Hope it helps ( I´m not an expert, you know )

Hi, Architeuthis: Here is a current topic with links to learning. See the response from Gaieus: http://forums.sketchucation.com/viewtopic.php?f=79&t=36926&p=325388#p325336