LUMINA Posted February 4, 2009 Share Posted February 4, 2009 How would one create a transparent background in their renderings using renderworks 2009? I need to have my backgrounds transparent for use in video and web applications. I have found no simple button like in Photoshop? I don't want white, I don't want black, I want transparent. Any info on this would be appreciated. Kenny Green http://www.luminatechnical.com/renering.html 1 Quote Link to comment
islandmon Posted February 4, 2009 Share Posted February 4, 2009 Transparent requires an Alpha channel. VW allows assignment of alpha via texture mapping>transparency>image mask. Export via PNG supports Alpha. You can also assign a video legal color like green or blue to alpha and then knock it out later during mask processing of the video just like in Photoshop. Quote Link to comment
cad@sggsa Posted February 4, 2009 Share Posted February 4, 2009 WOW... COOOOL... Quote Link to comment
LUMINA Posted February 5, 2009 Author Share Posted February 5, 2009 thanks, are there step by step instructions for this somewhere? I've been trying to locate this info in the Help files but it's hit and miss. One thing I just tried was to apply a single color (Chroma Green) as a Renderworks background. Then rendered the animation and the background remained, now I can hand it over to my Video department and they can knock out the chroma green...should work, I'm waiting to hear back from Video. Quote Link to comment
LUMINA Posted February 5, 2009 Author Share Posted February 5, 2009 Hey everyone, my experiment worked great. Just got back from my Video guys. All I did was choose the Rosco Digi-Comp Chroma Green color from the VectorWorks color Palette and specified it to be used as the Rendered background. My Video department simply Keyed out the chroma green and viola, a transparent background. Works great! This techniques can be used for any renderings or animations that require a "Alpha Channel" or transparent background. Kenny Green Owner - LUMINA Technical Design VW 2009, RW 2009, SpotLight 2009 Win XP, SP2 Intel CPU http://www.luminatechnical.com Quote Link to comment
gmm18 Posted February 5, 2009 Share Posted February 5, 2009 Can you post a video clip on your website or you-tube for us to see? thanks! Quote Link to comment
LUMINA Posted February 5, 2009 Author Share Posted February 5, 2009 sure, I'm slammed right now, but tomorrow I'll get something together showing this. Quote Link to comment
LUMINA Posted February 6, 2009 Author Share Posted February 6, 2009 (edited) Here you go, I posted the rendered orbital animation with the Digicomp Chroma green rendered background on my website. Scroll to the bottom of the webpage. There you will see two Stage8 Productions icons. Respective of the rendering with and without the chromakey background. http://www.luminatechnical.com/rendering.html Edited February 6, 2009 by LUMINA Quote Link to comment
LUMINA Posted February 9, 2009 Author Share Posted February 9, 2009 ok, all done. Now both files are uploaded. To summarize, my experiment was to take a VW orbital animation I created of 4 rotating plasma screens with the company logo and apply a chroma key Green background for the purpose of later applying a background video behind the rotating screens(since VW and Renderworks do not have these mapping options). Once the rendering was completed, the chroma green back ground was keyed out using Final cut pro and replaced with a live video piece from Stage8 Productions. This techniques works great. both of these example files reside at http://www.LuminaTechnical.com/rendering.html scroll to bottom of page for the files. You can also reach me at kenny@luminatechnical.com Quote Link to comment
CipesDesign Posted February 9, 2009 Share Posted February 9, 2009 Pretty cool...Thanks Quote Link to comment
islandmon Posted February 10, 2009 Share Posted February 10, 2009 Expertly done ... Just a thought .. on Mac you could use Quartz Composer to handle the processing and even allow various in>out transparencies for the rotating Logos. Quote Link to comment
Assemblage Posted July 13, 2010 Share Posted July 13, 2010 via texture mapping>transparency>image mask Sorry to labour this..but I would really like to be able to render out a view of my models with a transparent background, in order to drop into site photo. I would be eternally grateful if someone could spell out the steps just a little more..many thanks Quote Link to comment
Assemblage Posted July 20, 2010 Share Posted July 20, 2010 I'd understood mapping related to objects..does this mean using an object as background, in order to achieve the transparency in the png output? Quote Link to comment
islandmon Posted July 20, 2010 Share Posted July 20, 2010 Checkout: http://en.wikipedia.org/wiki/Alpha_channel http://en.wikipedia.org/wiki/Mask_(computing)#Image_masks Quote Link to comment
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