There are different ways through which you can do this crafting of 2D into 3D like of scalling, shearing. https://errorcode0x.com/fixed-dell-printer-error-016-302/ helped me to get the best way to do this.
The reason this hashtag started was that there was a guy in Japan criticized the company behind pokemon(gamefreak) saying that their 3D artist are useless. and skilled 3D models would be able to be made in 5 minutes. He mentioned that you can do 800 pokemon each in 5minutes so close to 60 hours will be only needed. and if they can't do that, they are not worth the salary. and 3D modelers took this as a challenge. Resulting in 3D modelers doing modeling / sculpting in various 3D software.
Don't know if you're still having this issue but it's fixed by enabling "Specify Manual Texture Size" and then playing with the "Manual texture size" input until it seems right.
Finding a perfect reference might be tough. Sometimes you have to spend hours looking for the right photo, wasting your precious time. PHOTOBASH might solve your problem. It is an online resource providing affordable royalty free photo packs. It features tons of high-quality image sets (some of them are even free) that can really help you.
The project provides images to Concept Artists, Matte Painters, 3D Modellers and Illustrators. You can use images freely in commercial and personal work. Feel free to utilize them for matte painting, photo-bashing, texturing or just as references for digital or traditional work.
The sets here are shot with some of the best cameras like the Canon 5D MkIII and Sony A7r II. Serious stuff!
PHOTOBASH provides images up to 8k Native Resolution and stitched panoramas of up to 20k.
All photos are said to be taken in uncompressed RAW format, processed and converted to high quality JPEGS.