Trying my hand at HDRI backdrops

comixfana

[Trying my hand at HDRI backdrops] and while I'm following the Quick start guide instructions (http://docs.daz3d.com/lib/exe/fetch.php/public/read_me/index/21981/21981_quick-start-guide-to-the-iray-dome-and-the-use-of-hdris.pdf) , the Bayou scene I'm trying to render looks like a messy blur of green, yellow and white.  The trees, water and sky aren't visible at all :( any tips?

I'm using a HDRI image from Google images ( https://www.google.ca/search?q=HDRI+bayou&client=opera&hs=qog&sxsrf=ACYBGNQOeRPXFXwnUe9J8wbJJlwvC-FG4g:1571766488286&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjs09C5trDlAhXpnuAKHQ_bBE8Q_AUIESgB&biw=1504&bih=750)

 

 

 

barbult

Some of those are very low resolution. To get a sharp background image rendered from an HDRI, you need sufficient resolution. Remember that the HDRI resolution is stretched around the full 360 degree environment. Your scene is looking at only a small part of the 360 degrees. If you zoom in on your character or scene, you are looking at an even smaller piece of the HDRI. I look for HDRI images that are 16000 pixels wide to get a reasonably sharp render. Even then, unless the camera is very wide angle, you can often see a marked difference between 3D character render and background render. 

Take a look at HDRI Haven.

Richard Haseltine

You don't say which you used, but the sizes listed under the earlier search results are very small - don't forget that the image is going to wrap right around the scene, so most of those are going to give only three or four pixels per degree of arc at best.

comixfana

Makes sense!  Thanks for the link barbult!