32bit/64bit colour difference!

[amer abidi]

Check this out...

 

Experimenting with vray proxies in a scene, I decided to run a 32bit/64bit compatibility difference to see to what extent i can use my 32 bit machines for a 64 bit render.

 

So I save the SAME scene on the SAME machine using the SAME bitmaps... everything is the same..environment settings..I even reset max's setting on both versions of 3D max.

 

refer to attachment:

[ATTACH]30419[/ATTACH]

 

The render, material editor and bitmap crop window on the left are of 32bit, and the ones to their right are of the same scene open in 64bit. It seems that both versions read colours of the same scene differently!! furthermore, Max 64bit renders the scene in 3:37 mins, while max 32bit renders the SAME scene on the SAME quadcore machine in 2:27!! Thats 33% faster render on max 32bit!!

 

Now i may understand that max 64bit uses more resources, so on and forth, and might take longer to render the scene, but why are they reading the same map differently?!? its as if one jpg is set to RGB and the other to CMYK!

 

Anyone has any info or experience with this?

[amer abidi]

.... It seems that 3DS max 32bit (left) reads the image as windows picture viewer does (centre); while max 64bit (right) reads it differently.

 

 

hmmm...

[ATTACH]30420[/ATTACH]

[amer abidi]

mea culpa! .. it seems like max 64 was reading an image with the same name from a different bitmap path. I confirm that they do render the same output with no colour difference:rolleyes:

 

Fact of drastic difference in render times remains though. Why are the times so far apart?!

[Macer]

Depending upon the actual scene complexity, for me 64 bit renders (the same scene) up to a minute faster than 32 bit on the same pc. This does vary but most of the time the 64bit option is faster.

 

Loads of variables though.....

[ihabkal]

less coffee might be good for you

 

Oh it used to happen to me all the time. So now I use the color correction map to adjust gamma instead of photoshop and making a differen file and getting confused about which is which and where to put it.

[amer abidi]

less coffee might be good for you

 

 

That's exactly how i felt rereading my post(s) after a two hour nap:o

[BOXXLABS]

there is no color difference between 32 and 64 bit versions of a rendering engine.

 

I can also confirm that there are no longer any color differences between modern AMD and intel CPUs. SO mixing machines on the same "renderfarm" is no problem.

 

[quizzy]

since 64bit is much preciser in calculating certain things in the render process, you can get color differences, well brightnes differences anyways.

be sure to always render scenes on one bit-age.

[amer abidi]

be sure to always render scenes on one bit-age.

 

elaborate please

[quizzy]

if rendering an animation, be sure to render that either in 32bits only or 64bits only

[mdviz]

have you checked your gamma settings within max