There are several types of Appaloosa markings. These are a combination of a Leopard gene "Lp" which causes mottled coats, and several Pattern genes "PATN1, PATN2, etc.", which create variations in Lp markings, each in a different, specific way.
Pattern genes follow a hierarchy. If multiple different Pattern genes are present, only one will display. Generally, double leopard (LpLp) increases white coverage. Snowflake and Peacock are codominant and can appear alongside some other Appaloosa markings.
Lp, PATN1, PATN2, Sn, and Pc are each in different series and are inherited separately. Appaloosa breeding can be a massive roulette!
Leopard gene without any pattern genes.
Creates irregular roaning patches on the body, spreading with age. nLp version may show no roaning.
May leave small spots of unaffected area
Skin is speckled with pink. In hooved creatures, mane and tail are white where skin beneath is affected.
Having two copies of the Leopard gene, LpLp, causes night blindness in a creature. It makes it very difficult to see in low light areas.
A single leopard gene and at least one Pattern1 gene. Pattern 2 genes are less dominant and won't show up
The "classic" appaloosa. Almsot totally white except for oval shaped spots of original color follow the hairline over the entire body.
Spots can be small or medium in size, but won't vary too much on an individual (i.e. back spots wont be tiny compared to large front spots)
Spots can be rather few or so numerous they collide, but appear on most areas of the body and usually follow fur direction
Both sides will be different!
Body may varnish with age, becoming paler/roaned in areas of original color
May have mapping, roaned white edges around spots
May have "scraping" marks around the edges of the white
Skin, tongue, and gums are speckled with pink, or maybe be totally pink where white touches.
In hooved creatures, mane and tail are white where skin beneath is affected.
Two leopard genes and at least one Pattern1 gene. Pattern 2 genes are less dominant and won't show up
Body is almost completely white except for very small ticked spots.
May have mapping, roaned white edges around spots
Extreme cases may mimic full-coverage Dominant White.
Skin is speckled with pink or may be solid pink.
In hooved creatures, mane and tail are white where skin beneath is affected.
Having two copies of the Leopard gene, LpLp, causes night blindness in a creature. It makes it very difficult to see in low light areas.
A single leopard gene and at least one Pattern 2 gene, no Pattern 1 gene. If Pattern 1 is present it will overwrite Pattern 2.
White starts on the rump and spreads down the back legs, stomach, and sides, with ovals and blotches of original color left inside.
Spots can be small or medium in size, and may vary considerably on the individual. Can also be so thick the spots seem to combine, or so minimal there are barely any spots.
Spots can be rather few or so numerous they collide, but appear on most areas of the body and usually follow fur direction
Both sides will be different!
Body may varnish with age, becoming paler/roaned and revealing more unaffected spots along the rest of the body
May rarely have no visible "blanket", and only show varnish and spots of unaffected areas
May have mapping, roaned white edges around spots
May have "scraping" marks around the edges of the white
Skin, tongue, and gums are speckled with pink
In hooved creatures, mane and tail are usually not affected, but may have streaks of white if white patterning touches the skin beneath.
Two leopard genes and at least one Pattern 2 gene, no Pattern 1 gene. If Pattern 1 is present it will overwrite Pattern 2.
Solid white blanket which may spread over most of the body, leaving only some of the head/neck uncolored.
Both sides will be different!
Body may varnish with age, becoming paler/roaned and revealing more unaffected spots along the rest of the body
May have "scraping" marks around the edges of the white
Skin, tongue, and gums are speckled with pink
In hooved creatures, mane and tail are usually not affected, but may have streaks of white if white patterning touches the skin beneath.
Having two copies of the Leopard gene, LpLp, causes night blindness in a creature. It makes it very difficult to see in low light areas.
At least one leopard gene, one Pattern 2 gene, and one Peacock gene. If Pattern 1 gene is present, peacock will most likely be covered up and not visible
Peacock is a modifier which creates white rims around unaffected color spots, which then become visible on the entire body even when no roaning is present. Because Blanket is the only pattern that reliably creates spots outside of the white area, peacock is usually only visible on Blanket appaloosas.
Having two copies of the Leopard gene, LpLp, causes night blindness in a creature. It makes it very difficult to see in low light areas.
At least one Leopard gene and one Snowflake gene. Snowflake is codominant to Pattern 2 and Peacock, and can show up alongside them. If Pattern 1 is present, it will override Snowflake and Snowflake will not be visible.
White spots are splattered over the body. May be a few disconnected white spots or look like flour has been spilled over the topline.
If paired with Blanket, Snowflake will respect the unaffected spots caused by Blanket and they will not be covered by Snowflake.
Skin is speckled with pink.
In hooved creatures, mane and tail are white where skin beneath is affected, creating thin white streaks.
Having two copies of the Leopard gene, LpLp, causes night blindness in a creature. It makes it very difficult to see in low light areas.
Is your character LpLp, nLp, or nn(no Lp gene)?
LpLp
Is your character PATN1?
Yes
Your character is Fewspot Appaloosa! They may be carrying the PATN2, Sf, or Pc genes, but the PATN1 gene covers them up!
No
Is your character PATN2?
Yes
Your character is Snowcap Appaloosa! If they also have the Sf gene, they are Snowflake Appaloosa! Snowflake will show up alongside the snowcap markings. If they have peacock, it will not show up, but can be passed on to offspring.
No
Is your character Sf?
Yes
Your character is Snowflake Appaloosa! If they have Peacock, it will not show up, but can be passed on to offspring.
No
Your character is Varnish! They only have a leopard gene, and no modifiers to alter its appearance. If they have Peacock, it will not show up, but can be passed on to offspring.
nLp
Is your character PATN1?
Yes
Your character is Leopard Appaloosa! They may be carrying the PATN2, Sf, or Pc genes, but the PATN1 gene covers them up!
No
Is your character PATN2?
Yes
Your character is Blanket Appaloosa! If they also have the Pc gene, they are Peacock Appaloosa! If they have Snowflake, it will also show up, so they could be a Blanket Snowflake or Peacock Snowflake Appaloosa, respectively.
No
Is your character Sf?
Yes
Your character is Snowflake Appaloosa! If they have Peacock, it will not show up, but can be passed on to offspring.
No
Your character is Varnish! They only have a leopard gene, and no modifiers to alter its appearance. If they have Peacock, it will not show up, but can be passed on to offspring.
nn
Your character is NOT Appaloosa! They may be carrying the PATN1, PATN2, Sn, or Pc genes, but without at least one Lp gene, these won't show up! Offspring can inherit these pattern genes, and if a child gets one of these and an Lp gene from their other parent, the child will be Appaloosa.