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Strenghth Maps: Colour or Grayscale? render resource question.
Posted: 03 June 2012 04:05 PM   [ Ignore ]
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Not getting a response on CGTalk, so I’m hoping someone knows the answer.

I applied an ambience strenth map to a background that was 24 bit, basically I pushed the contrast and got a good effect after I applied it.

My question is this: IF I had made it Grayscale, would it have taken less resources at render time, or does it matter at all?

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Posted: 03 June 2012 04:33 PM   [ Ignore ]   [ # 1 ]
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I would think it would use less memory if it were grayscale, but I can’t say for certain.

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Posted: 03 June 2012 05:21 PM   [ Ignore ]   [ # 2 ]
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I’m thinking that as well… but it would be interesting to find out… the reason I’m hesitant to grayscale the maps is because I don’t want to screw up the settings and have different ones for the various maps, which would be noticeable in the render.

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Posted: 04 June 2012 12:39 PM   [ Ignore ]   [ # 3 ]
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If you are already using the colour ambient map I would imagine its less costly to use it again as Strength map, than to add another map.I haven’t specifically tried to add a greyscale map, but I tried a few tests by plugging the Diffuse map in Ambient channel and I’m not sure I see a difference memory-wise (according to Task manager).

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Posted: 04 June 2012 03:52 PM   [ Ignore ]   [ # 4 ]
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just applying the colour map as a strength map wasn’t possible in this case.  I needed the ambiance to deepen the scene, which required a high contrast map.  Try doing that, you’ll be amazed at the difference.  All I’m asking is this: would it have been better to make it grayscale?

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Posted: 05 June 2012 12:20 PM   [ Ignore ]   [ # 5 ]
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I’ve been toying with that idea since about last October, I’ll do it sooner or later. wink
Greyscale will take less memory regardless, but I don’t expect it would make a huge difference unless your map is huge.

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