CGTalk - Maya 2009, renderPass, 16bits float and tiff, impossible ?

achoury

03-03-2009, 05:56 PM

Hello all,
My question is simple : how can i render my renderPass in 16 bits float in tiff format (not exr or hdr) ?
I make RGBA 4*16bits short in FrameBuffer.
I make all my renderPass in 16 bits float.
I choose tiff or tiff uncompressed.
Result : my renderPass are in 8 bits.

If i make all my pass in 32bits float, it is working.
So, tiff doesn't like the 16 bits float ?

Hi Damien
I think there is some bug here because when you choose RGBA [Short] 4x16 Bit, Normally you get all the passes in 16 Bit format!
here is the quote from the Maya doc:
Not available when using the Maya Vector renderer.Tagged-Image File Format with 16 bits per color channel. Maya saves the image and mask channels in one file, and the depth channel as a separate file. Maya generates TIFF files that use TIFF 6.0 compression. To generate uncompressed TIFF files, set the environment variable IMF_TIFF_COMPRESSION = none before starting Maya. Use uncompressed TIFF files when you intend to read the images into an application that requires uncompressed images or that supports the TIFF 4.0 standard.
But only the masterBeauty are rendered in 16Bit the rest of the passes are in 32Bit float!
Choose what ever extension you want tiff16; iff16; sgi16 with RGBA [Short] 4x16 Bit you get always the same result, only the master beauty are in 16 bit the rest are in 32 bit.
maybe Autodesk fix this in the next release!
/rachid

Edit: and there is some warning msg in the output Window
IMG 0.4 warn 102002: type rgba_h not supported by tif format, using default type rgba
/rachid