Imported textures have no transparency

[damyon]

I am trying to create a HUD out of some png images - but whenever I draw the image, it shows white where it should be transparent. The image is saved as a png with an alpha channel, but I tried tga as well with the same result. I am using 3.2 Indie Edition on Linux.

 

The image file is attached.

 

Here is my code to load the image:

 

function Script:Start()

self.texture = Texture:Load("Materials/HUD/hud.tex")

 

end

 

And here is my code to draw it:

function Script:PostRender(context)

context:SetBlendMode(Blend.Alpha)

 

context:SetColor(1, 1, 1)

left = context:GetWidth() - self.texture:GetWidth()

top = context:GetHeight() - self.texture:GetHeight()

context:DrawImage(self.texture,left,top)

context:SetBlendMode(Blend.Solid)

 

context:Sync();

end

 

What I think the problem is:

 

The automated conversion to textures is converting all images to DXCT1 RGB which has no alpha channel, but the working transparent textures that come with the editor use RGBA.

[Josh]

Switch to DXT5 compression.

[damyon]

Aha - I found where to change it and it works now - thanks. Maybe this should be the default for imported images with alpha?

[Josh]

Most images have alpha, I think. At least PNGS will I chose DXT1 because it uses a lot less space and still looks good.