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Render Passes?

LotharenLotharen Posts: 282
edited August 2015 in New Users

Okay, thank you for your input on my first topic. Now for my second question. ;)

I was researching for hours last night to find a way to perform render passes. I found a great tutorial on how to render each light seperatly and how to combine them in photoshop to make each light customizable to a certain extent. That part was really easy.

Now, how would I go about just rendering the Diffuse, Glossy, and Specular parts of an image so that I can use those like I did the individual light passes? I can't for the life of me figure it out - I even messed with 'Bricks' and that just made my brain want to explode. Wish there was a book just to explain the power of that!

So, does anyone know how I would go about doing that? or is it just not possible in Daz Studio?

 

Thanks again for any assistance!

Post edited by Lotharen on

Comments

  • ToborTobor Posts: 2,300

    D|S supports multiple render engines. Which one are you using? The techniques are different.

     

     

  • LotharenLotharen Posts: 282

    I use all three that I have, depending on the look I'm going for. I use iray the most, followed by 3Delight and I have Reality 4 which I seem to have more trouble with atm. If I can find out for all 3 that would be awesome - gives me more tools to work with.

  • ToborTobor Posts: 2,300

    Render passes using Iray will require the use of canvasses. There's not much documentation yet on this, though there are a couple threads here, and some non-DAZ Studio discussions on other blogs. To access Iray canvasses, click on the Advanced tab in the Render pane, then click on Canvasses. The built-in canvasses are provided. These are saved as EXR files, which you then manipulate in a program like Photoshop. To get the best results, turn tone mapping OFF (because EXRs have a much broader range of tone mapping already).

    I don't use 3DLight multi-passes other than to borrow from existing scripts. There are a few on ShareCG, and some for sale in the DAZ store. There are some discussions of it in the forums, like this one:

    http://www.daz3d.com/forums/discussion/6946/scripted-multipass-render-to-add-outlines

    Though I have Reality, I don't use it now with Iray. There's a dedicated forum for it over on Runtime DNA (I recall) where Paolo fields questions.

  • ToborTobor Posts: 2,300

    I forgot to mention: when you do a multi-canvas render, include the Beauty pass when doing any of the others. That way the render is sure to reach full convergence before quitting. If you do just an individual, and not a color pass at the same time, odds are the render will complete well before the scene has converged.

  • LotharenLotharen Posts: 282

    @Tobor Thanks so much! This is just what I was looking for. I found something about that last night but the pic's didn't quite show where to access that at. I was attempting to do it once the render was finished with pull out pane on the left. I'll see what I can do with this!

  • DekeDeke Posts: 1,635

    Interesting new direction to explore.  This could be helpful with my current project.  If there are other links/tuts out there, I'd love to learn about them.

     

     

  • LotharenLotharen Posts: 282

    Well, I've gotten eveything to work using the Canvases except the Glossy one - it always comes out completly black no matter what node settings I use. Specular and Diffuse work just dandy so Im' not sure whats up there. Any of you have some thoughts?

    Oh, also the Distance node didn't seem to work either. Perhaps I should just use DOF on the main camera?

  • ToborTobor Posts: 2,300

    Yes, they work, but you have to open the EXRs in Photoshop (or similar) and adjust the tonal range --  Image->Adjustments-HDR Toning. 

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