# Step 3 DSM, Orthomosaic and Index

**URL:** <https://community.pix4d.com/t/step-3-dsm-orthomosaic-and-index/4953>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [September 15, 2015, 11:26am UTC](https://community.pix4d.com/t/step-3-dsm-orthomosaic-and-index/4953 "2015-09-15T11:26:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Clarence\_Ndunguru1](https://avatars.discourse-cdn.com/v4/letter/c/c67d28/32.png) [@Clarence\_Ndunguru1](https://community.pix4d.com/u/Clarence_Ndunguru1)\
**Post date:** [September 15, 2015, 11:26am UTC](https://community.pix4d.com/t/step-3-dsm-orthomosaic-and-index/4953/1 "2015-09-15T11:26:40Z")

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Dear Users

&nbsp;

I am having this strange problem since using new release. when processing my data, step 1 and 2 successfully complete, but step 3 get stuck at 48%. Anyone facing similar problem?

Additionally, in this step if i want to export only the Orthomosaic, it is not possible, it forces me to selected DSM first. Why is that? If I just need the aerial image so save processing time, I want to switch off exporting DSM, why is that not possible? Anyone has an idea?

&nbsp;

Clarence

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**Author:** ![Matthew\_Hoyler1](https://avatars.discourse-cdn.com/v4/letter/m/e274bd/32.png) [@Matthew\_Hoyler1](https://community.pix4d.com/u/Matthew_Hoyler1)\
**Post date:** [September 22, 2015, 11:52pm UTC](https://community.pix4d.com/t/step-3-dsm-orthomosaic-and-index/4953/2 "2015-09-22T23:52:45Z")

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Clarence, not sure why it is getting stuck at 48%, but the DSM is needed because it is used to create the orthomosaic so since you’re already creating one you might as well export it. The export shouldn’t add a lot of time to processing.