# Zooming in causes RT to start rendering from scratch

**URL:** <https://forums.chaos.com/t/zooming-in-causes-rt-to-start-rendering-from-scratch/63808>\
**Category:** Issues\
**Created:** [May 6, 2017, 6:20pm UTC](https://forums.chaos.com/t/zooming-in-causes-rt-to-start-rendering-from-scratch/63808 "2017-05-06T18:20:49Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![JezUK](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/jezuk/32/62402_2.png) [@JezUK](https://forums.chaos.com/u/JezUK)\
**Post date:** [May 6, 2017, 7:03pm UTC](https://forums.chaos.com/t/zooming-in-causes-rt-to-start-rendering-from-scratch/63808/2 "2017-05-06T19:03:26Z")

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> [@Adjusting VFB Curve breaks compositing workflow](https://forums.chaos.com/t/adjusting-vfb-curve-breaks-compositing-workflow/55043/10):
>
> Why does RT start rendering from scratch when I zoom in in VFB? Is this a bug? It happens only the first time I zoom in after which zooming in doesn’t cause a restart. This happens when using RT in Active Shade mode and in Production mode as IPR.

I get this too - very frustrating to have a render restart all over.

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