# Understanding scale in apps

**URL:** <https://forum.logik.tv/t/understanding-scale-in-apps/635>\
**Category:** Tips and Tricks\
**Created:** [September 10, 2020, 2:58pm UTC](https://forum.logik.tv/t/understanding-scale-in-apps/635 "2020-09-10T14:58:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![imag4media](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/imag4media/32/255_2.png) [@imag4media](https://forum.logik.tv/u/imag4media)\
**Post date:** [September 10, 2020, 2:58pm UTC](https://forum.logik.tv/t/understanding-scale-in-apps/635/1 "2020-09-10T14:58:31Z")

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Previous demo showing the impact of scale when bouncing FBX between apps. Just because it looks right thru the included camera, doesn’t mean it’s correct. This can affect DoF, AO, etc.

https://player.vimeo.com/video/440187455

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**Author:** ![andy\_dill](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/andy_dill/32/15475_2.png) [@andy\_dill](https://forum.logik.tv/u/andy_dill)\
**Post date:** [September 10, 2020, 9:54pm UTC](https://forum.logik.tv/t/understanding-scale-in-apps/635/2 "2020-09-10T21:54:37Z")

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I never knew flame was in millimeters. @space_monkey and I were talking about that last week.

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**Author:** ![imag4media](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/imag4media/32/255_2.png) [@imag4media](https://forum.logik.tv/u/imag4media)\
**Post date:** [September 10, 2020, 10:50pm UTC](https://forum.logik.tv/t/understanding-scale-in-apps/635/3 "2020-09-10T22:50:53Z")

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Technically it’s in “display space” but if I bring in a cubic meter fbx from Houdini, set the ruler define to 1000, then offsetting an axis by 1000 lines up perfect. The FilmBack is in inches, but I made a glsl shader for variables that lets me calculate correctly. Also can verify that when set up that way, DoF is accurate to my on set apps.