[Closed] Saving 32 Bit/Channel RGBA BMP

Greetings

I’m trying to write some RGB, and Height (pos.z) data into an image sequence and am having some trouble.

for each frame, I’m creating a BMP
bm = bitmap iX iY filename:(tgtPath + @”” + fileName + “.exr”) numframes:c color:[0,0,0,0] hdr:true

then writing a row or two of data
setPixels bm [pos] #([RGBApixel])

then saving
save bm frame:n gamma:#auto quiet:true

during testing, I used
display bm

and I could see it says 32 bits per channel RGBA

but when I look at the file in windows it says it’s just a true colour 24 bit bmp? or when I load the exr into touch designer it only sees 8 bits per channel.

Any ideas?

Cheers

Mikie