This option is calculated based on the UV coordinate value of the texture, not from the size of the polygon, when slicing a texture (divided into multiple textures) that is mapped to multiple polygons. Desity Factor specifies the ratio of the resolution (number of pixels) of the original texture to one side of the rectangle that is closest to the shape of the target polygon.
When Desity Factor = 2, the texture is output so that the number of pixels is doubled for one side of the rectangle closest to the shape of the target polygon.
[Example 1]
Texture size (X, Y) = (32,32) pixels
Density Factor = 1.0
Maximum Slice Size option is OFF
Front view (red numbers are polygon numbers)
Original texture: (X, Y) = (32,32) pixels
Output texture [polygon 0]: (X, Y) = (24,10) pixels
Output texture [polygon 1]: (X, Y) = (16,21) pixels
Output texture [polygon 2]: (X, Y) = (24,21) pixels
Output texture [polygon 3]: (X, Y) = (16,10) pixels
[Example 2]
Texture size (X, Y) = (32,32) pixels
When Desity Factor = 2.0.
Maximum Slice Size option is OFF
Original texture: (X, Y) = (32,32) pixels
Output texture: (X, Y) = (64,64) pixels
[Example 3]
Texture size (X, Y) = (32,32) Pixel-mapped polygon side length = 3 (X direction) x 1 (Y direction) SI unit
Density Factor = 1.0
Original texture: (X, Y) = (32,32) pixels
Output texture: (X, Y) = (32,32) pixels