Shader room - problem with .PNG file type - Polyloop

Bonzai Gopher · 27th January 2006, 00:27

Hi,

I have tried loading a .png file into the bump channel of a shader I'm working with. I keep getting an "Open Error" with some files. This is using Carrrara5 Pro on Windows XP.

I have tried saving the png file as Interlaced, and non-Interlaced, but it doesn't seem to help. The file is 2544x2544 pixels in size, but the same file as a jpeg works.

Thanks for the help,

Glen

Joppe · 27th January 2006, 00:58

Well, if the jpeg works than your problem is solved I think? ;-)

Joppe

Bonzai Gopher · 27th January 2006, 01:04

No, it doesn't fix the problem in Carrara if it's a bug with the png support. Besides, the png format is better since it is a lossless format unlike jpeg.

Glen

are · 27th January 2006, 10:34

Try increasing the bit depth of your png up to 24 - I find that low bit depths (eg 4) have this problem but higher ones are ok.

Bonzai Gopher · 27th January 2006, 19:44

Hi there,

Thanks are, it's fixed! Someone suggested I try using a different program to create the png files, so I grabbed the latest copy of The GIMP. I opened up the files, converted to greyscale and resaved as png. Worked great! Apparently, the png support in Corel Draw/PhotoPaint 10 is a bit dated.

So it looks like Carrara is working fine!

Cheers,

Glen

27th January 2006, 00:27	#1 (permalink)
Bonzai Gopher Spline Join Date: Jul 2005 Location: Toronto, Canada Posts: 35	Shader room - problem with .PNG file type Hi, I have tried loading a .png file into the bump channel of a shader I'm working with. I keep getting an "Open Error" with some files. This is using Carrrara5 Pro on Windows XP. I have tried saving the png file as Interlaced, and non-Interlaced, but it doesn't seem to help. The file is 2544x2544 pixels in size, but the same file as a jpeg works. Thanks for the help, Glen

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27th January 2006, 00:58	#2 (permalink)
Joppe Say nothing Join Date: Dec 2005 Location: The Netherlands Posts: 110	Well, if the jpeg works than your problem is solved I think? ;-) Joppe

27th January 2006, 01:04	#3 (permalink)
Bonzai Gopher Spline Join Date: Jul 2005 Location: Toronto, Canada Posts: 35	No, it doesn't fix the problem in Carrara if it's a bug with the png support. Besides, the png format is better since it is a lossless format unlike jpeg. Glen

27th January 2006, 10:34	#4 (permalink)
are AKA RamPackWobble Join Date: Dec 2005 Location: Anglesey, North Wales, UK Posts: 216	Try increasing the bit depth of your png up to 24 - I find that low bit depths (eg 4) have this problem but higher ones are ok.

27th January 2006, 19:44	#5 (permalink)
Bonzai Gopher Spline Join Date: Jul 2005 Location: Toronto, Canada Posts: 35	Hi there, Thanks are, it's fixed! Someone suggested I try using a different program to create the png files, so I grabbed the latest copy of The GIMP. I opened up the files, converted to greyscale and resaved as png. Worked great! Apparently, the png support in Corel Draw/PhotoPaint 10 is a bit dated. So it looks like Carrara is working fine! Cheers, Glen