Try ...

... this:

Modeling Bald or Swamp Cypress; Trees with amazing root systems for your deep south swamp railroads; Dick Whitney; Model Railroad Hobbyist Sep 2012 pg 93

It discusses cypress tress and cattails, but not slime (that I could see).

There is a blog in this forum which, I recall, was by a hobbyist from Switzerland who, working with a hobbyist from France, put together a diorama of a swamp. Rod Goodwin's index does not find it and the search engine in this forum seems to be failing at this time. The blog I am referencing was done sometime in the first quarter of this year.

Check this out here, amazing

Check this out here, amazing work this guy does.

http://www.modelrailroadforums.com/forum/showthread.php?t=28590

Thanks, Michael - that was it

That was the person I was thinking of and his friend was not from France - it was Germany: Stefan Foerg.

The modeler was the OP in your referenced blog: Jürg

As I recall, he did have a technique for "pond scum" for his swampy regions.

I found the OP from my browser history

Here is his (Jürg's) OP in this forum:

https://forum.mrhmag.com/post/the-swamp-diorama-12192624

Muskrat Ramble's Atchafalaya Lousiana Swamp Railroad

Some of the later pages (8+) show the scenery materials used and there are close-up photos of their pond scum technique(s). Also many photos for inspiration:

http://johnsullivan.smugmug.com/Hobbies/The-Muscrat-Rambles/19160426_RQZkhv#!i=1492905059&k=xDL6MMz

There were a series of articles in Narrow Gauge Downunder a few years back (2009-10) on the techniques employed in constructing Muskrat Ramble. As I remember, the green swamp water was created by painting the base the desired shade of yellowish-green, then water medium poured over that and surface textured.

Good luck in your efforts.

Delbert

Dear Delbert, Close, but

Dear Delbert,

Close, but not quite  

- Obtain cheapest thickest nastiest housepaint you can get your hands on
(If it can be a mucky murky brown-y greenish, so much the better. Small "sample pots" are great for model-sized jobs... )

- stipple housepaint onto the lake/creek/swamp base using cheap (read - disposable) small housepaint brush
(Geoff N used MDF as a base for all water)

- Let dry, the paint "thickness" + stippling action will provide the random ripple in the surface, the paint will "sag" slightly during the drying process, taking the tips off the otherwise "too pointy" stippled texture.

- if the housepaint wasn't the desired color, cheap brownish-greenish murky color paint goes on next

- and once dry, a thin layer of your fave slick/shiny treatment.
(NOTE! If using 2-part envirotex or similar, it has to be a _very_thin_ layer,
if slathered on too thickly, the "self leveling" behaviour of such coatings can render your beautiful ripples "under flat glass" in appearance...)

Happy Modelling,
Aim to Improve,
Prof Klyzlr

...only a few miles from "Muskrat Ramble" build headquarters...

Prof ...

 !

Thanks

Thanks guys. Both links I already have. The guys done a great job. The only thing I miss is a description. But I'm thinking now that I didn't recall that I could contact them. How stupid I am

Jure, Slovenia

oops

oops I missed Prof Klyzrl's post.  Many thanks.

Jure, Slovenia

Cheap paper bowls - practice first

You might want to try out your paint colors first by painting them in cheap paper bowls available at grocery stores. I found the "right" swamp color by looking at pictures of the prototype and mixing colors being careful to record the mix colors / ratios and then painted the bowls. After the paint dried I coated the paint with high gloss clear. I showed the bowls (there were 7 of them) to my wife and the guys in my operating group and asked which colors looked the most realistic. Most everybody picked 2 of the same colors.

Upate:  Here's a picture of Potter's Pond, behind the roundhouse and engine shop.

Another source of info

Our long time buddy, Scarpia (frequent contributor here), wrote a blog here on his "Chainsaw II" layout about 4 years ago before relocating to the mid-east. He discusses his swamp design here:

https://forum.mrhmag.com/post/progress-on-chainsaw-ii-12185089

He has a "milky white" scum on the surface of his swamp pond. He mentions "swamp ground cover from Scenic Express" (one of our sponsors). In looking through there 2011 catalog, they have a few things you might like to use.

(Found this by doing a search - the Drupal search engine is finally retrieving some results)