Making HDRI image from flat map

Anki

I just spent a whole day looking for this...

I want to make a seamless image for use as hdri image.

I have the map, made in photoshop, but when I make it into a 3d ball, it pinches the poles.

I know there's a filter somewhere that distorts the image, so you can then make it into a ball without the poles pinching.

Here's an example of what it does :

Base image 

End result

Anyone know ?

Thanx ahead

Sven Dullah

You need to create a spherical map of the image, I don't have PS but there should be a filter that converts from rectangular to polar or something along those lines.

Anki

Sven Dullah said:

You need to create a spherical map of the image, I don't have PS but there should be a filter that converts from rectangular to polar or something along those lines.

Yes, this feature is found in filter > distort > polar coordinates : rectangular to polar.

However, this results in an ugly pinch at the poles.

There is a way to avoid this by morphing the image before that. But I can't remember what.

Sven Dullah

http://multimedia.uqam.ca/Animate/Expe%CC%81rimentations%20Belzile/Make%20a%20Spherical%20Map.pdf

Anki

Sven Dullah said:

http://multimedia.uqam.ca/Animate/Expe%CC%81rimentations%20Belzile/Make%20a%20Spherical%20Map.pdf

Thanks.

It's not the same thing as the filter I was looking for, but it's a good enough workaround.