Create transparent images for html use with Blender Cycles render engine

Object of tutorial : Create transparent images for html usage with Blender 3d I use blender Cycles engine for render and blender compositor to mask and make the final result.

What i use:

  • blender download Here (free 3d program)

  • First we create a little studio in Blender for render our object (use Object Index = 1)
  • A box with 2 side of lights L and R (use "geometry>Backfacing" for no cast light out of box).
  • White Background (simple diffuse material).
  • Gray top (simple diffuse material).
  • World set to black.

Blender studio box

blender-material

blender-material

blender-material


  • We place the object into the studio box and set camera for render 
  • Setting up passes before render
blender-passes
  • Then we render (my rend 450 samples) and open composer to start play with it
simple-render

  • We use Diffuse Direct-Indirect-Color and IndexOB to create a filter.For better result we add to this filter a vignette so smooth every hard cut from image i group all in vignette so i can control only what i want outside the group.

blender composer

blender compozer passes

blender composer detail

The mask filter
blender mask to image

The result image
Blender transparent web image


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