color data is lost once render finishes

  • On 06/07/2015 at 13:54, xxxxxxxx wrote:

    User Information:
    Cinema 4D Version:   15+ 
    Platform:   Windows  ;   
    Language(s) :     C++  ;

    I noticed that when I render "using my Renderer, or Cinema4D standard renderer" , I can change image colors while it is rendering "gamma, exposure, ..."

    once the render finishes, a lot of data is lost "as if it is converted from 32 bits to 8 bits". "so dark areas appear losing a lot of data when increasing gamma, also light areas gets clamped"

    this happens only once everything finishes "may be at the exit of render inner stage"
    what should I do to avoid this?

  • On 07/07/2015 at 02:28, xxxxxxxx wrote:


    could you explain what exactly do you mean with "once the render finishes"? Do you mean a certain message or the saved files? Do you talk about the bit depth you can set in the "Save" settings?

    Best wishes,

  • On 07/07/2015 at 07:44, xxxxxxxx wrote:

    while it is rendering buckets "in the  render inner stage" , everything is fine.
    once all buckets are done, the whole image changes, a lot of data gets clamped "or possibly converted from 32 bits to 8 bits"

  • On 07/07/2015 at 08:20, xxxxxxxx wrote:

    after some testing, the cause of this is the Save option->Depth->8 bits/channel,why it affects the final image even without saving?

  • On 08/07/2015 at 01:30, xxxxxxxx wrote:


    I'm still not perfectly sure what you mean with "once all buckets are done". Do you refer to a certain stage of the rendering process?

    Best wishes,

  • On 08/07/2015 at 06:36, xxxxxxxx wrote:

    I'm not sure which stage is it, but I think this applies after all stages are finished "after applying all videopost effects", the Save settings overrides the image "converting it from 32 bits to 8 bits" even when save is turned off

  • On 08/07/2015 at 10:41, xxxxxxxx wrote:


    even if "Save" is disabled the final image is still displayed in the Picture Viewer and consumes memory. I guess this is why the final bit depth is applied.

    Best wishes,

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