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I want to do an octant with semi-transparent panels with drawings on them. I achieved part of the desired effect, but the drawing is almost invisible against the white background, or when the other panels are semi-transparent too. I'm using "Blender Render" as the render engine.

Drawing visible when there is no transparency.

opaque octant

Drawing barely visible with the red panel semi-transparent (alpha 0.5).

red panel semitransparent

Drawing almost invisible when all three panels are semi-transparent.

three panels semitransparent

I'd like to have the panels semi-transparent (still showing their colors, but the image not so transparent). I think 0.5 alpha should give me a #808080 gray for the drawing, why is it becoming so white?

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  • $\begingroup$ Please mention which render engine you're using. $\endgroup$ – Ray Mairlot May 4 '18 at 15:19
  • $\begingroup$ @RayMairlot Thank you, I added the engine to the end of the question. $\endgroup$ – Rodrigo May 4 '18 at 17:50
  • $\begingroup$ What color is your background? $\endgroup$ – Dontwalk May 4 '18 at 18:13
  • $\begingroup$ @Dontwalk World: Horizon Color is set to white, which is what appears in the background on the images above. Also, those images are print-screens, since no file is being generated, despite there's a full path + filename in the Output of the Render options. $\endgroup$ – Rodrigo May 4 '18 at 18:27

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