Hello Francois, have you used zbrush import to xsi ? Could I ask you
if i'm doing this all right ?
Christopher
Monday, April 17, 2006, 11:56:23 AM, you wrote:
> You are right.
> The MaxDisplace setting also plays a role in the calculation of the BSP
> tree, hence the speed up in rendering you experienced. This is
> particularily true when using motion blur.
> It sould always be set to the highest displacement value on the object.
> If you have an 8 or 16 bit image to drive the displacement, and you have
> a change range set to 0, 0.5, the max displace value should be set to
> 0.5 and no more.
> Sam Cuttriss wrote:
>> are you sure?
>> ive managed to speed up renders considerably in the past by bringing
>> excessive max displacement settings down to a reasonable level?
>> has something changed with these settings?
>>
>> From what i gather the max disp setting defines the bounding box of
>> the object before mental ray tessellates it.
>> if it is set too large mentalray assumes the object will exist in
>> places where it does not, this bog down its preliminary visibility
>> calculations.
>>
>> can someone please correct me if this is wrong?
>> _sam
>>
>> /*SAM CUTTRISS*
>> *3D AFICIONADO*/
>> <http://www.janimation.com>
>>
>>
>>
>>
>>
>>
>> Chris Marshall wrote:
>>> When running 4.2 (I think) we had major problems with displacement
>>> (still do sometimes) but it was to do with a very spikey object, once
>>> in a while would have some of it's spikes cropped. It took ages to
>>> find a fix, but in the end we cranked up the Max Disp to something
>>> like 300. It didn't slow the render times in any way, but it insured
>>> the render was correct. Personally I wouldn't worry about it, as long
>>> as it's set to a value higher than that which you want your
>>> displacement to go.
>>>
>>> Chris
>>>
>>>
>>>
>>> Wayne wrote:
>>>
>>>> Christopher,
>>>> If you'd like, contact me off list. polypimp(at)gmail.com
>>>> -wayne-
>>>>
>>>> -----Original Message-----
>>>> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
>>>> Behalf Of
>>>> Chris
>>>> Sent: Sunday, April 16, 2006 1:53 PM
>>>> To: kim aldis
>>>> Subject: Re[4]: Max Displacement issue?
>>>>
>>>> It's alright, I've already spent too much time on this already. I'm
>>>> just going to get rid of my copy of zbrush. No need to help further.
>>>>
>>>> Christopher
>>>>
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>>>>
>>>
>>>
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--
Best regards,
Chris mailto:walksfar(at)netscape.ca
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