View Full Version : Does modeling in 1/1 scale matter for rendering with mr?
October 20th, 2005, 15:59
I've always wondered about this.
Does it matter if one model stuff in 1/1 scale for rendering with mental ray with any of its features?
November 6th, 2005, 20:07
If you want to use FG or GI, it's better to model to 1:1, because GI computation is more easier with large scene (because is based on physic). Instead, no troubles, you can model as you want 1:2, 2:1...etc... but for GI it's better...
November 16th, 2005, 00:29
I've come to notice that its destroyed my Fg/GI calculations if i work outside of maya's default unit of centimeters. (Destroyed being, the calculations are dog slow and very innaccurate). If I treat the CM units as the "unit-I-need" ie ... Feet/meters/etc .. and use the rule of 1 CM = 1 FOOT/1 CM = 1 YARD .. etc then things are usually ok. Anyone else find anything like tihs?
November 17th, 2005, 14:17
The unit choise will impact all the shaders whose paramaters refer/depend on a lenght, for instance the max distance for a dirtmap or occlusion shader.
If you want to sure how the units are converted into mr, get a unit cube and export it into an ascii mi file, then edit it and go check what the cube vertices coordinates look like.
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