Henning Hraban Ramm wrote:
I'd like to place some plain photos rotated (say 12°) and with a blurred shadow above some colored elements, i.e. the shadow must use transparency. I guess I could get such using ImageMagick, but is there a possibility using ConTeXt or one of its favourite friends?
I'd prefer a solution that works with CMYK data.

Creating a semi-transparent backdrop with metapost is quite simple,
but I am not sure whether that works with cmyk, you'll have to try
yourself. Code goes something like this:

\startuniqueMPgraphic{texthole}
for dx = 0 upto 40:
  dy := dx;
  wa := 10 + dx;
  wb := \overlaywidth - dx - 10;
  ha := dy + 10;
  hb := \overlayheight - dy - 10;
  fill (wa,ha)--(wb,ha)--(wb,hb)--(wa,hb)--cycle
      withcolor transparent("normal", .04,white);
endfor;
\stopuniqueMPgraphic


If there isn't - is the transparency of PNG usable?

Sure, and may use less resources than mp drawings, but that is
definitely RGB

Best wishes,
Taco
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