Static decorative object is an invisible obstacle

[Guest]

I replaced the green and red columns in the Decorate function in Slade 3

The green one appears in the game fine, but the red is an invisible obstacle.
Their sprites were imported together, and the code is copied and pasted.

ACTOR Tall_Green : TallGreenColumn replaces TallGreenColumn
{
Radius 16
Height 40
ProjectilePassHeight -16
+SOLID
States
{
Spawn:
COL1 A -1
Stop
}
}

ACTOR Tall_Red : TallRedColumn replaces TallRedColumn
{
Radius 16
Height 40
ProjectilePassHeight -16
+SOLID
States
{
Spawn:
COL3 A -1
Stop
}
}

Any reason I'm missing as to why the red one isn't appearing?

[eharper256]

You are most likely missing a sprite called COL3A0 from your /sprites/ directory. Or, something else is replacing TallRedColumn at a later stage of your loading sequence.

[Enjay]

Another possibility - the offsets haven't been set, so the sprite is there, but it is inside the ground and therefore invisible. Strange for this mistake to be made for just one of them but it could be that.