Here's a list of the different categories of TF tropes I will periodically be posting Art and YCHs for. These are organized by catalyst (cause of transformation) NOT subject. If there's any that seem appealing to you specifically and want a YCH or direct commission of, or if there are any you like that are missing please let me know!

Clothing

A Transformation triggered by a garment or something worn.
Often used in fantasy or Halloween themed stories where the wearer becomes what the outfits depict.

Animal shaped armor

Blowgun Darts

Bracelet

Cloak

Collar

Corset

Costume

Gloves

Helmet

Leather

Mask

Necklace

Pants

Shoes

Swimsuit

Ring

Underwear


Experiences
Transformations are triggered by traumatic events, often depicting an awakening or descent.
This category is for transformations triggered by such powerful experiences.

Allergic Reactions

Bite

Broken Bracelet

Broken Egg

Broken Glow Stick

Broken Necklace

Cocoon

Dream

Drowning

Exposure to Water

Falling off a cliff

Hearing High Pitch Noise

Limit Break

Overcoming a Fear

Overcoming Handicap

Pet Lick

Rage

Reading Book

Rescuing an Animal

Scratch

Shape Shifting

Sting

Food
Transformation triggered by food consumption.
Also a classic for Halloween candy or spiked punch at a party themed stories. It's also used in some fairy tales taking the adage "You are what you eat" literally.

Cakes

Candy

Chocolate

Cupcakes

Eggs

Fruit

Meat

Punch

Pie

Pizza

Vegetables

Holidays
Transformations Triggered by a special date.
Typically Halloween but sometimes around Christmas Santa needs a reindeer.

Christmas

Easter

Halloween

Thanksgiving

Valentine’s Day

Locations
Transformations triggered by special locations.
Often used in stories but rarely depicted in art, sometimes just being at a cursed location triggers a change in perspective.

Altar

Barn

Bathtub

Beach

Bedroom

Cave

Circus

Desert

Factory

Farm

Forest

Hospital

Hot Tub

Jungle

Laboratory

Park

Pond

Pool

Ruins

School

Shrine

Swamp

Tank

Temple

Theme Park

Wishing Well

Zoo

Magic
Transformations Triggered by magic.
It's Magic 'nuff said.

Bomb

Book

Bracelet

Circe

Circle

Cursed Gift

Cursed Idol

Divine Intervention

Fusion

Genie

God Manipulation

Hat

Hunter Becomes Predator

Hunter Becomes Prey

Hypnosis

Infection

Lesson Teaching

Magic Ray

Molding

Music

Necklace

Pants

Paper Cut from Magic Book

Potion

Punishment

Rings

Soda

Strange Drink

Sword

Wand

Words

Materials
Transformations triggered by coming into contact with specific materials.
Materials are largely sense related like smell or touch.

Fire

Gas

Goo

Paint

Scales

Scent

Skin

Smoke

Water

Objects
Transformations triggered by significant objects.
These are usually significant to the person or have pseudo-magical properties like idols.

Crystal

Contact Lenses

Mirror

Plush Toy

Strange Perfume

Statue

Treasure

Toy

Vehicle

Voodoo Doll

Science
Transformations to science and science fiction.
Mad Scientists, Alien machines and multidimensional stuff goes here.

Alien Healing machine

Brainwashing Machine

Bracelet

Computer Error

Cryogenic Tube

Devolution

Evolution

Exposure to alien atmosphere

Extraterrestrial Interference

Fossil

Game Glitch

Injection

Lab Accident

Lab Explosion

Meteor (touching)

Operation table

Parasitic Body Part

Pills

Potion

Robot

Necklace

Radiation Exposure

Ray Gun

Soda

Strange Drink

Strange Machine

Toxic Waste

Virtual Reality Error

Virus

Weather Events
Transformations triggered by the weather.
Sometimes rain can affect your mood, this is just a really extreme version of that.

Aurora Borealis

Direct Sunlight

Eclipse

Full Moon

High Winds

Lightning Strike

Meteor Shower

Nightfall

Rain