we would need pictures to give a good guess 
also the material you are using
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Product is from Amazon, 1.75mm PLA silk filament, the brand is 3DGenius. It’s from Shenzen China
Someone said it doesn’t have inner wall support. I get that. but someone else had to have been successful at printing this, so how did they do it? I didn’t enlarge it, I printed as is.
China…
I’m having the same problem with infill not going into my prints. Don’t know how to fix it.
Rebecca, please ask your question just once in the forum.
You posted this picture at least in three topics and it would be clean and efficient if you ask only once per problem.
You would get the same amount of answers but it would consume less time of the helping members…
Thank you for understanding.
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so…no infill sounds like vase mode
under Model Structure is Model Structure Type which needs to be set to Normal
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i did a few of these sharks as well. they all had infill
also from the abuse given by grandkids in the tub the articulations would just snap off without infill. somehow grabbing it by the tail and swinging around over head just never occurred to me
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Rebecca 
Thank you! I shall try that 
Rebecca
I merged the different sub-threads into this one. Sorry if this might be a bit confusing here, but this way all information is sitting together, and the other threads remain specific to their headline.
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Thanks!
Rebecca
Thank you
Rebecca
So, I did a thing… The head took 10 hours, and the body 14 with a work speed of 150%. not ideal, but the build came out great, and I owe it all to you! I want to say how grateful I am for your support, and I’m sorry if I messed up your clean forum by posting in more than one place. I didn’t think about the fact that I wasn’t messaging a specific person. I’m new, I am sorry! I’ll never do it again.
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now that’s a lizard!
Welcome to 3d printing, have fun!
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