Weird artifacts coming out of my model. (Beginner)

Hi, i am trying to model a man-shark hybrid. But when i turn up my multires modifier there appears some weird artifacts out of my model. Please help.

Model check it out for yourself: https://drive.google.com/open?id=0B2HF0mIAcBpKMTBPelk1d1RqQjg

When you save your blend file use the ‘compress’ option in the save settings so I would only have needed to download a 27 MB file instead of a 221 MB file !

You object has face normals that are inverted (darker areas of the mesh). Select all vertices and recalculate normals (Ctrl+N). Sculpting with inverted normals can cause issues, take more care.

You need to clean up the mesh, such as in the example image


Your mesh has holes in it such as at the top of the leg. Take more care with modelling. Ideally use only quads with subsurf modifier, possibly triangles if needed but not faces with > 4 sides. Take more care with your modelling.


Your mesh has spikes from the sculpting. You can fix some with the smooth brush but this is a common bug.
You can drop to a lower division level and delete the higher levels and re sculpt or just delete and learn from the mistakes to make a better result

I tried to recalculate normals, but it is stilll a mess! I have compressed it now, please download and take a look again¨’
Thank you so much!

File: https://drive.google.com/open?id=0B2HF0mIAcBpKV0dXV293VDY3SE0

Hi, i am modelling my first model and i have now seen that when i apply subsurface modifier my model gets these weird poles and new surfaces i never made. And i cant figure out how to get rid of them:/ Can someone please take a look and give me some advice!
ALL help is highly appreciated for me as a beginner, where im trying to learn this amazing software.

Model: https://drive.google.com/open?id=0B2HF0mIAcBpKV0dXV293VDY3SE0

I tried to press CTRL+N and all that, but it didnt work.
Could you please show me how to get rid of these artifacts. I dont understand.

Compressed file: https://drive.google.com/open?id=0B2HF0mIAcBpKV0dXV293VDY3SE0

I tried to recalculate normals, but it is stilll a mess! I have compressed it now, please download and take a look again¨’
Thank you so much!
I assume you did the obvious thing by selecting the faces you wanted to recalculate the normals for ?

Also please DO NOT start multiple threads asking the same thing !

In your modifier stack the modifiers are applied from top to bottom so you can get different results depending on their order. The mirror modifier always needs to be above the subsurf.

Look at the model without the multires or subsurf on so you can look at the base mesh and actually see where you have poor mesh. You model still has holes as previously shown and you have vertices crossing over the centre line (not good for mirroring)

You have the spiking so as previously mentioned delete the high sculpt levels and do it again.