New to Blender. I recently finished rendering out an image sequence. One of the objects contains an emission shader. I want to make this object glow using the 'glare' node in the compositor. I can import the image sequence and use nodes such as hue/gamma/saturation/contrast etc. but when I try to use glare node: no effect. I opened a new project, and rendered a cube with an emission shader, and used the render layer in the compositor, this worked. But for my animation I only have the completed image sequence, not sure what to do.
Thanks
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2 Answers
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When you move Glare-Treshold from 1 to 0 you can see Glare works (somehow).
Reason why it is not working for red emission object is because you saved sequence as PNG, that is 8-bit color depth, so you lose emission power information.
New scene with the Cube worked, because you composite direct unsaved render - full color depth (high dynamic range), that is not afected by color bit depth of saving file format.
To use image sequence for that purpose you have to set render output as OpenEX (or Multilayered) file format that is 32-bit.
You can alternatively use your rendered 8-bit PNG sequence, but you have only a chance if you:
- matte red pixels and increase strengh or
- matte red pixels and use glare only on this pass and mix together
One of the possible ways of second option is ...
But as you can see, it will be always difficult to glare red on purple that is similar color. Or you can make it more visible if you dont care it became white glowing object.
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If your in blender 2.8 and above you can switch to eevee render engine and you can enable bloom in the render settings
