Hello dear community :)

Note that I started with Blender less than 4 days ago. I have a simple scene with 2 texts, 1 Sun light and another lamp light. I managed to make the lamp light move so that shadows move as well - keyframes with location - I have another text, rather flat, and I want its transparency to change during the animation. I converted this text into a mesh and then I was able to apply different transparency values which I was able to record with keyframes - property: available -

When I "play" my timeline I can see both the lamp moving and the transparency changing. But....

When exporting the whole thing to a video or even a single image of my timeline, my transparency is not processed at all.

Do you have an idea of what is going wrong ? Are there special options to enable ? Here is a short video of the blender interface with the timeline playing. You can see the light moving behind and the transparency changing next to the point of view.


  • $\begingroup$ could you upload the file, there could be some unexpected buttons checked. $\endgroup$
    – A M
    Commented Feb 11, 2019 at 22:13
  • $\begingroup$ Yes of course. You can find the file HERE. $\endgroup$
    – OLM
    Commented Feb 12, 2019 at 6:15

1 Answer 1


Thanks for the file, i didnt realise that you were using Blender Render, i cant help you with that because i only use cycles and eevee.

If you want the retro-aesthetics of blender you could even use eevee and configure it that way, plus benfit from the rendering speed.

In Cycles as in EEVEE you would do your animation via the Node-Editor and animate the facture of a mix shader that hast one diffuse and one transparent shader (with absolute white!) in it.

enter image description here

  • $\begingroup$ Ok thanks for your response. I have so much to learn about this powerful tool (whose GUI is not very intuitive, though). $\endgroup$
    – OLM
    Commented Feb 13, 2019 at 10:31

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