background pictures

Laandan

how do you import a background photo in to Daz

 

Richard Haseltine

Window>Panes(Tabs)>Environment.

JD_Mortal

Just a NOTE here...

The values in the "Advanced" area of the "Render settings", may alter your image quality. [Medium Threshold] and [High Threshold].

Default it 512 and 1024, which, in almost all my cases, will compress the image, creating odd "boxes", on the image. Unless your image is smaller than 512x512 (It is a horribly setup compression, possibly even inaccurately setup. At least when it comes to the "background image".)

If you see a strange checkerboard pattern across your image, with cubes that are darker on the top-right corner and brighter on the bottom-left corner, with purple and yellow discoloration on the two remaining corners... Then your background image is being compressed. You will have to raise those values to something LARGER than your actual background image size's original values, so it does not attempt to compress it. (Why it compresses a background image, I have no clue. It should just be drawing it, as-is, as the background image. But it doesn't.)

Honestly, you are better-off rendering it transparent and then using another program to paste the rendering on top of that background image. Because altering those values will stop ALL images in the scene from "being compressed", which may eat-up a LOT of memory. Makes those 5000x5000 texture-maps for eyes and fingernails, a nightmare to deal with!

Below is a 1080p image gradient PNG... Used as a background image in a 1080p scene. There should be 0% compression or resizing...

The second image, which is the "rendered image", shows the "boxes" you are looking for. Seen across things which should be a smooth transition/gradient.

The third is 400% close-up of the "issue"...

Setting the values for 2000 and 2000, so the 1920x1080 image fits within those ranges... Will stop it from being compressed, as well as ALL the images in the scene, which are below 2000x2000 in size.

I also noticed that it adds a "Gamma" to the image too... That shouldn't be happening, it shouldn't be "rendering it" or altering it in any way, at all... it is a direct pixel replacement for the alpha-chanel. (Well, it should be.)

I also see that it blurs the image, like a "Tile"... I see the bottom has a Red tone line, where it should be pure white... So many things are wrong with that option... It should not be tiling it. lol.

Just stick with post-editing. :P

That is obviously another "left-over" setting, from 3Delight rendering, which just isn't managed correctly for IRAY. (I do hope they fix that for IRAY. I actually asked them to remove that whole tab and put that in the "Render settings", where it actually belongs, in the "Environment" area. But, I would rather have it "fixed" first. No need to keep moving broken things into the IRAY zones.)

nonesuch00

I usually render in UHD iRay & that makes muost back ground images too small or a few too large. Regardless, the ones that are too big can be used by cropping the background image to the UHD size (or ther render size) you are rendering too.