Hatch Transparency Value Not Updating in DWG file

[KyleeChangg]

	`private static Hatch CreateHatchForPolyline(IPolyline polyLine)
	{
		var transparency = new Transparency()
		{
			Value = 50
		};

		var hatchBoundaryPath = new Hatch.BoundaryPath()
		{
			Flags = BoundaryPathFlags.External, // Set appropriate flags as needed
			Entities = new List<Entity> { polyLine as Entity } // Add the polyline directly
		};

		// Create the hatch and set its properties
		var hatch = new Hatch()
		{
			Paths = new List<Hatch.BoundaryPath> { hatchBoundaryPath },
			IsSolid = true,
			Transparency = transparency,
			IsAssociative = true,
		};

		return hatch;
	}`

Describe the bug
In the code above, I created a function that creates hatches in relation to polyline entities with the hatch transparency value set to 50%.

These hatches show up fine in the console when trying to write. However, in the dwg file the hatch transparency value is reset to "ByLayer" and the 50% transparency does not appear.

[KyleeChangg]

@DomCR Any pointers for where I can find when the hatch values are written to the document?

[DomCR]

Hi @KyleeChangg,

I've been looking at this issue, I'll need to open a branch to explore it further, for the DXF the transparency value is not implemented, and for the DWG it seems that there is an error in the method WriteEnColor the transparency value doesn't seem to take any effect on the entity written.

Thanks for the report!