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OpenGL want floor shadows it can be faked

WendyLuvsCatzWendyLuvsCatz Posts: 38,494
in Daz Studio Discussion

a quick "tutorial"

(and poor example as it actually rendered faster in iray with my extralow settings because of the interactive smoothing)

but will work with anything grouped and instanced, the instance lined up with it and scaled to -1 on the Y axis to make pancake shadow objects

it will appear black if negatively scaled in OpenGL so creates a convincing overhead lit shadow

Comments

  • Catherine3678abCatherine3678ab Posts: 8,384
    WendyLuvsCatz said:

    a quick "tutorial"

    (and poor example as it actually rendered faster in iray with my extralow settings because of the interactive smoothing)

    but will work with anything grouped and instanced, the instance lined up with it and scaled to -1 on the Y axis to make pancake shadow objects

    it will appear black if negatively scaled in OpenGL so creates a convincing overhead lit shadow

    Now there's a spark of genius! Good tip :-)

  • KitsumoKitsumo Posts: 1,216

    Brilliant! I never would have thought of that.

  • NorbzNorbz Posts: 14

    Sometimes it's the little tings :) - good stuff. I do this in psd all the time, didn't think to do it here, wonder if we could fade/guassian blur it somehow too.

  • WendyLuvsCatzWendyLuvsCatz Posts: 38,494
    Norbz said:

    Sometimes it's the little tings :) - good stuff. I do this in psd all the time, didn't think to do it here, wonder if we could fade/guassian blur it somehow too.

    you could hide the originals and render two png layers and blur the shadow one in a video editor but since I basically do the same thing using drop shadow, brightness and perspective filters on a duplicate layer in Hitfilm rather pointless.

    I actually got the idea from something I often do in iClone 6 that doesn't have drop shadow 

    I render an alpha video from above and texture my floor plane with it in the opacity channel 

  • NorbzNorbz Posts: 14

    ^ Got my brain going, thanks. rendering out just shadows, masking them, baking them, even just a Gblur in final cut on a mask.. I'm going to try some stuff. I do often render in openGL for preview - will admit every few years I do the 'openGL shadows/daz' google search to see if there's a tweak or update, this is pretty cool and close. Real shadows in opengl would be lovely at that speed, not sure how the various 3D website render engines work but even those get some damn good live results.

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