How to fix my models looking like this in roblox studio?

[heroguy1134]

My models look like this in blender

What they look like in roblox studio

[Pokemoncraft5290 (Based)]

Looka like inverted normals. Select ice cream mesh in Blender, go into edit mode, press a, hit alt n, and select recalculate outside.

[solvuntur (kwijt)]

Alternative fix: Enable DoubleSided normals in the properties of the mesh.