# Step-by-Step Tutorial: Homework of Session 3 - Level 1

**URL:** <https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-3-level-1/439>\
**Category:** Drone Workshop (2015)\
**Created:** [October 30, 2015, 10:42am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-3-level-1/439 "2015-10-30T10:42:54Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![rszoeke](https://www.simscale.com/forum/user_avatar/www.simscale.com/rszoeke/32/14_2.png) [@rszoeke](https://www.simscale.com/forum/u/rszoeke)\
**Post date:** [November 5, 2015, 1:03pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-3-level-1/439/12 "2015-11-05T13:03:13Z")

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Hi @1318980,  
most probably you just forgot to apply the “warp by vector” filter, es described in [the tutorial of level 1 from session 2](https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-2-level-1/387).

Best,  
Richard

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