[Therion] xtherion - Multiple background sketches

[Bill Gee]

Hi Olly -

Thanks for the hints!  I was able to get several sketches combined in GIMP.  Looking at the result, it is very obvious that much more work is required in the cave.  There is a huge hole in the middle which has no detail at all.  There are missing walls in several places.

My plan now is to print the combined sketches on a piece of paper.  The next survey trip I will draw more on it.  That will then become the background in Therion.

The room is not so big as to be a problem in Therion.  It would probably fit in a bounding box 25 meters on a side.  That is a large scrap, but I think it should be no problem to draw.  The two entrances to the room are well-defined, so adding it to the map will be fairly easy.

========
Bill Gee


On Monday, June 21, 2021 6:24:28 PM CDT Olly Betts wrote:
> On Mon, Jun 21, 2021 at 04:31:45PM -0500, Bill Gee wrote:
> > Now I need to figure out how to set transparency on each layer.
> 
> Bring up the Gimp "Layers" dialog (shortcut key is Ctrl+L) and you can
> click on each layer and drag the "Opacity" slider to make them partly
> transparent.  Or you can change the mode on each layer to "Darken only"
> and the result will be the darkest part of any layer, which is probably
> what you're after (assuming your sketches are dark lines on a white
> background).
> 
> > I wonder if Bruce's faint memory about setting transparency with an
> > external editor worked because of using PNG format?  My own faint
> > memory is that xTherion uses different libraries to handle png and jpg
> > files.  Handling of transparency is probably a feature of the image
> > library rather than xTherion.
> 
> I don't think the standard JPEG format supports transparency.
> 
> Cheers,
>     Olly
>