Trees 101....
#1
Got a request from Charlie yesterday to do a detailed dive into how I model trees on my layout.  Since most of the track that I model is deep in the Lehigh Valley Gorge away from industries and towns, I have had my fill of modeling the deep green of the forest.  

   

I will first say that most of the ideas that I'll present in this primer are not my own, and I pick and choose how and what advice I use to suit my own tastes.  I also model trees in the late summer timeframe, so there may be some leaves turning, and the color palette is generally more faded than the bright green of spring.  With that said, many people also model fall foliage, but there's nothing to say you couldn't model winter - after all, many trees don't possess leaves for up to 6 months of the year.  I would think that modeling bare trees would be much harder than the leafed varieties.  Adding some sort of cover over a tree armature covers up a multitude of sins.

As with all things natural, I have a few basic rules that I follow in creating scenery:


1)  Try something.  The worst that can happen is that you toss it or paint over it and start over.


1A)  Don't assume you have to be Van Gogh.  Reread guideline #1....

2)  Nature is random.  (In other words, just about anything is possible).  A beer while you work on an organic scenery project can be highly influential because you care less and your subconscious can take over (I swear that's where artistic talents (if they exist) are buried).

3)  Nothing in nature is uniform.  (There are many shades of green and every shade is represented in just about any tree, shrub or plant.  Take a look at a mountain - from a long way away the colors are fairly uniform, but as you get closer to it, there are all kinds of different trees with different shapes and different colors).  Caring less while you have that beer is going to be beneficial in an environment with few rules.

4)  Anything made by man is not random and tends toward uniformity.  A beer while you work on something manmade (a structure, vehicle, or a model) is discouraged because you have to care more.

5)  Take frequent breaks and look at your project from a different perspective as you work (view it from a different angle, a different distance, different lighting).

6)  Have a plan, but keep it loose.  Sometimes your best ideas are inspired while you work.

Trees....  So much variety in nature.  I model Northeastern Pennsylvania.  Spruce, hemlock (all dead now), oak, maple, locust, pine, walnut, birch, etc., etc., etc.  The area you model may be completely different and some of my suggestions aren't applicable, but maybe they can be altered.  I don't model cacti, sequoia, redwood or the great plains.  For those that do... good luck!

We model things in miniature and we try to convince the viewer that there's more space than just what we have available.  Backdrops help, but there are also some basic perspective methods that are applicable with building trees.

1)  The greater the distance, the smaller the tree.  The further away the viewer is, the less distinct that tree will appear.  Conversely, the closer the distance, the larger the tree can be and the more detailed that tree should be.  Also important - the further away the viewer is, the more the color of the mountain becomes unified.  The closer you get to the trees, the more you can see that there are actually many shades of green, blue, brown, red, etc.

2)  For those that model trees on mountains (as I do) - Take a look at a mountainside and look at the trees.  Only those on the bottom of the slope can be seen in their entirety.  Anything higher than those base trees is nothing more than a green 3-d blob.  Therefore, for a very flat simulated hill, you really only have to have detailed trees on the base of the mountain in front of blobs of green to convince your viewer that there is a mountain there.

Here's a great example.  I actually fabricated ZERO trees to create most of this mountain, and the distance between the track and the backdrop here is no more than 4 inches.  Note that the colors change more at the bottom of the moutain and the trunks are not visible other than at the base of the mountain.  I got this idea from a short article in Model Railroader from an issue in the early 80's...

   

Well, this is a start.  In the next submissions I'll focus in on details for tree creation, placement, etc.  I hope you can take some of these tricks and apply them to your own version of reality.


 
Check out my "Rainbows in the Gorge" website: http://morristhemoosetm.wixsite.com/rainbows
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#2
There are a few basic materials that I find useful in building trees, portions of trees, or the tops of trees - again modeling late summer when most of the trees still hold onto their leaves.  That said, I always do try to add in dead trees - especially because I model 1976 when the gypsy moths were doing quite a bit of damage to our oak population.

Materials: (let me know if I should take pictures of some of this stuff)

1) Polyfil.  There are a lot of varieties available, but the most economic way to buy polyfil is buying a bag from a craft supply store or even Walmart.  The big drawback is that it will be WHITE.  Unless you're modeling virgin snow, it's useless right out of the bag.
2) Spray paint.  Believe it or not black spray paint is my essential.  Look at any tree and once you get beyond the surface of the leaves, the interior of a tree is basically black.  Different shades of green are also good - everything from a medium yellowish to a deep forest green and several shades in between.
3) Bagged moss in a variety of colors.  I've used bags and bags of this stuff in combination with polyfil balls to cover 80% of my mountains.  Light brownish to bright green and everything in between.
4) Scenic foam (smaller varieties) in a bunch of different colors from orange, red, yellow (fall colors) and as many different greens as you can find. 
5) Matte medium
6) Spray adhesive
7)  Leaf flock - as many colors as you can find.
8) Tree armatures - commerial varieties are either plastic or metal, but Woodland Scenics does offer some kits with sedum sprigs as their armature material.  My go to is the seed head of a pyramidal hydrangea, and that's probably the secret (for ease of building and realism) to my foreground trees.

https://bigbluetrains.com/attachment.php?aid=39769

9)  White and wood glue.

That's about it for materials.  Again, for modeling trees in the distance on a hill, polyfil balls and moss are going to fill up 80% of that hill and are a great start to modeling a mass of trees.  I began modeling my mountains back in 2015 after finishing my backdrops.  Any mountain looks much more realistic in 3 dimensions and adding simple puff ball trees and moss to its surface is an instant improvement.  As you can see in the photo below, after painting my Sculptamold brown, it was populated with a mix of moss and polyfil balls.  I intentionally mixed the colors which also adds to the 3d effect.  Each was dipped in some yellow wood glue, stuck up against the brown surface and secured with a single straight pin (ideally with a colored ball on the top to help you find them later after the glue has dried...

   

Details on making polyfill ball trees (this is pretty much straight from Dave Frary's fantastic book - the 3rd edition of "How to Build Realistic Model Railroad Scenery":

1) Pull out a hunk of that white polyfil straight out of the bag and stretch it into a flat mat.  Spray it liberally with black spray paint until it doesn't look white anymore.  Let dry and hit it with some varieties of green spray paint.  Let dry again.  (Note:  This green mat can become quite useful for other things.  For example, (see the photo below) I needed a backdrop of trees for one section of White Haven and I had very little distance for trees.  I spray glued the mat right to the backdrop - which was the secret to my flat mountain in my previous entry).

   

2) Pull clumps of the painted polyfill and roll them into balls with your two hands.  Size isn't too important, but I generally like to keep them between an inch to an inch and a half in diameter.  Once it's in the round shape I dip each ball in matte medium (a little tray helps for this), and I drop the ball into a plastic bag that's been prepopulated with ground foam of a variety of colors.  Shake the ball around in the bag and in about 10 seconds pull the colored ball out and stick it in a cardboard box while they dry.

https://bigbluetrains.com/attachment.php?aid=39667

I'll address detailed trees and other forest scenery in the next entry in this series.  Let me know if I missed anything or something needs more explanation.
Check out my "Rainbows in the Gorge" website: http://morristhemoosetm.wixsite.com/rainbows
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#3
Thanks Todd. I will be following. 
Charlie
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#4
Puffball trees and polyfil mats - I addressed these in the last two entries, and like I said, those can be 80% of the scenery on a hill or mountain or near against a backdrop.  Once you get to the base of the hill or you're into the foreground areas of your area to model, trees need to look like trees including trunks and ground covers.

Once I'm through installing my puffball trees and I'm ready to attack the detail and/or foreground trees, I take a bit of time to generate the ground cover into which I'll mount my trees.  It doesn't make a whole lot of sense to install trees on a surface that doesn't look realistic.  The handiest thing I've found for overall leafiness on the forest floor is a bunch of discarded scenic remnants that I can "green and brown stuff".  I have a plastic bin of this stuff that is generated when I get the vacuum out or I clear off my desk from a scenery project.  Ground foam, sawdust, pieces of pyramidal hydrangea, sedum, folidage clusters, and probably the most important item - coffee grounds.  Heck, if you wanted to dry out your leftovers from your morning coffee, those would work, but I don't drink much coffee at home, so I bought a pound of cheap decaf that works just fine when I need to add to the green and brown stuff.  The coffee grounds are just right for simulating deep forest dirt, which is loamy, rich and dark.  Leaves will dry out on top of it and so lighter brown stuff looks realistic when applied on top of the coffee.  Most of my forested areas also have a significant amount of understory and near the edge of the track, brambles and weeds.  Foliage clumps and moss clumps in a variety of shades of brown and green do the trick.  The ground covers get secured with a solid base coat of wood glue and additions can be attached with a some regular strength white glue followed by a diluted white glue solution.

Detail trees.  I've built these in a number of ways with varying success.  My first attempts were done with painted metal armatures draped with ground foam impregnated polyfil.  I think it was a set of 10 trees, but the expense.....  Had to be a more cost effective way....  I dug around my property for dried shrubbery in the fall - sedum, azalea, spirea.  That made decent armatures that were draped with painted polyfil mat with some additional ground foam on top.  From a decent distance?  Not bad.  Close up?  Not really what I was shooting for.

I was out for a walk in the neighborhood with my wife in the early spring and noticed my neighbor's hydrangea seed heads.  They are horticulturists at heart and have invested some decent money into non-standard shrubs and trees.  Most hydrangeas have very round flower heads, but my neighbor's were pyramidal in shape and the flower petals in the spring had mostly all fallen off, resulting in a brown pryramid of branchy growth.  I asked whether I could lop some off, and they were only more than happy to have me prune their shrubs.  I got two very large garbage bags and I'm still working on exhausting the 2nd.  The more formal name for these is a panicle hydrangea and they are reportedly very easy to grow:

Panicle Hydrangea: The Easiest Hydrangea to Grow - Birds and Blooms

Once I pull them out of the bag, I decide how big a tree and what type of tree I want to model.  Since they are pyramidal, if I lop the top off of the seed head, I can easily model and oak.  Leave it on?  A spuce or hemlock.

   

Once I have it to size (maybe I lop off the bottom of the trunk to get something shorter), I spray the upper section of the thing (the seed heads) with adhesive (my current fave is Gorilla Glue Spray Adhesive) and then dip the side in some prepared trays of leaf flock material.  The leaf flock trays are actually mixtures of different colors of leaf so that the leaves on each tree have some variance in color.  I have a deep green, a medium green, a light green and a blue.  I roll the tree around in the tray and hand drop additional flock on the tree until I'm satisfied.

   

I then dunk the bottom of the trunk in wood glue, take a screwdriver of the same approximate diameter as the base of the trunk and poke a hole through the scenery and then jam the trunk into the hole.  Easy peasy...  tree installed.

For forests, the trees get wedged pretty tightly together.  In towns, I'm more selective about location and I spread them out - just as you would as a property owner.  

See? no magic necessary....

   
Check out my "Rainbows in the Gorge" website: http://morristhemoosetm.wixsite.com/rainbows
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#5
nice tutorial. to add i use cheap flat clear spray paint as an adhesive and there are uses for the white polyfill it makes good looking 3d clouds with a hint of flat gray paint, found this method on one layout the back wall had a lot of holes in it.
Jim
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#6
I thought of snow, but not clouds - cool idea, Jim!
Check out my "Rainbows in the Gorge" website: http://morristhemoosetm.wixsite.com/rainbows
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#7
Thanks again Todd. I like the way you model using inexpensive materials.  Many folks starting out need advise on saving money and these trees look better than the ones that sell for a buck each (or more). 

Charlie
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#8
Yeah, Charlie. I thought about marketing and selling these armatures, but the shipping was going to kill me. I think anyone that models scale trees ought to go to their local nursery and purchase a panicle hydrangea....
Check out my "Rainbows in the Gorge" website: http://morristhemoosetm.wixsite.com/rainbows
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#9
(09-14-2025, 01:35 PM)TMo Wrote: Yeah, Charlie.  I thought about marketing and selling these armatures, but the shipping was going to kill me.  I think anyone that models scale trees ought to go to their local nursery and purchase a panicle hydrangea....

well, we in the southwest don't have that option we use sagebrush instead
Jim
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