Using the relight tool in Nuke

This is a for the sake of documentation [also explained in Nuke Master Classes 2009 on foundry website in great detail ]and for new Nuke artist to know about  \,,|_ RELIGHT  _|,,/  plugin that allows a little more control over 3d space in nuke with nuke 3d feature . I mean little don’t expect lighting a bad ass scene in nuke . lighting dude are still required to do a great deal of the work. ( by the way I am a lighting artist by birth, that’s not important here at all ) . Okay enough chatter… lets start I am going to use   ARNOLD ” the awesome ness ” because its so much easier to do everything, you spend time lighting  the shot and no time clicking buttons unlike done in mental ray [which i still respect ] and  I would edit this post in future explaining how it is done in Mentalray.

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This is how simple the scene is two sphere’s a light a camera and a arnold renderer.

I have assigned a aistandard shader and set to AOV to output Normal and point position passes. I have rendered a exr with all the passes as channels [ also provided in the zip file attached]. Relight is available in Nuke 6.0.4 [I think ??] onwards and its a hidden tool. You have to update your plugins to be able to see it. So on the toolbar to the left side in Nuke interface that says other, under that go to All plugins and select UPDATE.  Once you have clicked it you have to navigate your self to allplugins option again and you see

alphabetically categorized tools. under R select Relight  or press TAB and type relight to load the tool.

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Relight node needs a few inputs  before it can actually work, a scene camera of the lighting file [fbx format 2009 only], a material [created in nuke], a scene node to communicate light and  relight node and normal pass and point position pass [which can be in layers or exr channels ].  Connection of channels, settings of relight options are explained in image below.

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Now I have connected a phong material to the material input of the relight node, you can choose any one you like and also connect  a directional light or a light of your choice to the scene 3d node in the Node graph. immediately you will a light effecting the 2d image with a dull bright light this light can be rotated in nuke 3d view selection or via option box of light. Rotating the nuke light  will effect 2d image as if it were in a 3d world space.

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You can merge the output of relight with rendered beauty as a normal pass   and continue with the flow

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pls note you can also see the 3d scene camera based point cloud for better control and accuracy in positing the lights with use of positiontopoint node . shown in image below and the nuke file attached

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Please note this is a rough edit of the post, language and format will be corrected eventually.

Shared Dropbox folder 🙂 

Recreating a 3d model a new way

Thanks to autodesk there is a more effective way to create a 3d model from image sequence that is quite impressive and better looking than the last one plus it does not involve the hassle of exporting from mesh from meshlab, direct fbx and obj exports that works fine…  :(. that sofware is really hardcore 🙂 .. any ways the 3d scan that is generated is done all online the software that autodesk provides is just the interface. hmm.. ” I AM NOT GOING TO SHARE MY TECHNOLOGY 😛 ” just kidding. The software is 123d Catch (h***:// and its very very user friendly this is what i tested with

IMAGE SEQUENCE  [from autodesk gallery]






Mesh generated  : wire frame and texture






















and after getting it into zbrush

HDR Photography

High dynamic range (HDR) images enable photographers to record a greater range of tonal detail than a camera could capture in a single photo. This opens up a whole new set of lighting possibilities which one might have previously avoided . With use of simple equipments and a fair knowledge of photoshop. There are a lot of sites with all info about how to generate hdr images.
This one that I am sharing is a good one.

HDR part 1

HDR part 2


My iPad 2 is all I require…

The awesomeness of iPad with a 3G connection is all that I need as a artist to my daily work, let it be sketching, staying uptodate with my rss feeds, movies photoedit, you name it and there is a way to do it on ipad2 except using a 3d application…heheh now that would be super crazy… Why would I want to do that.. Any ways I did not know about this WordPress blog app so I could never find time to post on the blog, now I can concentrate on that too even at work… Hahaha *evil*..
List of apps I use

Let’s ccc

For painting
Adobe sketch book pro, brushes, adobe idea( vector clean ups),
For photo editing
Photoshop touch… Hahaha this is crazy it works like the on a pc but ofcourse the interface is different but most of the major tools are here, iPhoto from apple. Inc
photo uploadin to picassa I use imageshack and webalbums hd for picassa
discoverapps to find out more apps

What else that could be important that you could use….

Good apps like bookcreator and PDF creator can be good tools to creat tutorials and ebooks… and Skype to communicate, flipbook to stay close to few sites, stumble to discover more related sites. Splashtop to seamlessly control my desktop ( with audio ) phew I am getting tired of typing… Heheh…and azul any format video player and with passcode… * super evil*