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.r16 file output - Use of all 256 level?

Started by WiZaxx, August 23, 2007, 03:29:20 pm

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WiZaxx

Surely hope this is not too silly...

I would like to force WM to output the r16 highmap using all 256 shades of grays.

Is it possible?

TA,
WZ

Stephen

I'm not sure if I follow?

The .r16 format is a 16bit RAW format, in which each height value contains a value between 0 and 65535 denoting the elevation.

If you want a 256-shade file, use the basic 8-bit RAW option.
-- Stephen Schmitt
- Creator of World Machine

WiZaxx

August 23, 2007, 04:08:06 pm #2 Last Edit: August 23, 2007, 04:11:27 pm by WiZaxx
OK then.

I'm converting to 256 levels eh?!

My only allowed input is r16 RAW, though.
So Is there a trick to force the terrain to the full spectrum in WM? What I need is actually a relative elevation rather than an absolute one; hoping that this will translate in having 256 levels after converting.

I must sound like a mad scientist here...

Stephen

If you want to make sure that the terrain spans the entire range on export, insert a Clamp device between your terrain and the file output node. Check the "Normalize" box in the Clamp, then export. It should now span the entire range of terrain heights.
-- Stephen Schmitt
- Creator of World Machine

WiZaxx


Sneer

Am I getting it right, if i don't use the normalize option, it doesn't use the whole 65535 scale ?

Stephen

_Potentially_, yes.

When you setup your height range in WM, a value of 0 in a 16bit raw will correspond to elevation 0m, and a value of 65535 will correspond to, say, 3000m.

For example, If your terrain's lowest point is only 500m, then the smallest value in the raw output will be 500m/3000m * 65535 = 10922.

This is by design; however, if you don't have to try to match heightfields or anything else similar, you can normalize the terrain which will ensure that the HF spans the entire 0..65535 range.
-- Stephen Schmitt
- Creator of World Machine

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