The impact of reducing JPEG quality in PS

[puha0941]

Hello,

I have a quick question about texture JPEGS.
What happens if you save the same texture with a low or mid quality in Photoshop keeping the same number of pixels.
Would this affect the final render? If so, how much would it be affected?

Thank you!

[Undersky]

I haven't saved a texture as jpg for over ten years... Jpeg is a destroying format which of course will affect the final output of your scene. Just try and save the jpg, zoom in and watch the artifacts show up. If you also use it as a specular, bump etc. and the light plays over the surface, you're sure to see it. And really, storage is cheap (again) nowadays, so there isn't any reason to save as jpg.

[puha0941]

Hello! Undersky
Thank you for your help. In which format should I save the textures at? Would you give me some other tips about rendering as well?
Thank you

I haven't saved a texture as jpg for over ten years... Jpeg is a destroying format which of course will affect the final output of your scene. Just try and save the jpg, zoom in and watch the artifacts show up. If you also use it as a specular, bump etc. and the light plays over the surface, you're sure to see it. And really, storage is cheap (again) nowadays, so there isn't any reason to save as jpg.

[Micha_cg]

I use PNG all days. It's using a lossless compression and support integrated alpha.

[Dariusz Makowski (Dadal)]

openEXR is what you usually want... Its opensource supported by vray.

[puha0941]

Is it true if you use openEXR it wall save RAM when rendering?

openEXR is what you usually want... Its opensource supported by vray.

[Dariusz Makowski (Dadal)]

Yes it can do it. I depends how the file was saved I believe.

[fpedrogo]

Is it true if you use openEXR it wall save RAM when rendering?

Only if you are using VRimage in the output panel and select EXR as your output extension.

[puha0941]

I am wondering if using vray textures in exr format will save RAM?

Only if you are using VRimage in the output panel and select EXR as your output extension.

[puha0941]

Yes it can do it. I depends how the file was saved I believe.

Hello, Thanks!
What do you mean by how it was saved? Could you explain further on it please?

[Undersky]

Is it true if you use openEXR it wall save RAM when rendering?

Also, if it's saved in tiles, I believe V-Ray can load only the part of texture that's in the current bucket, which will save ram if you have large textures.

Otherwise, tga is a safe bet. It's faster to read/write than png. I usually use tga or sometimes png.

[puha0941]

Thanks,

How do you save in the tiled exr format?

Also, if it's saved in tiles, I believe V-Ray can load only the part of texture that's in the current bucket, which will save ram if you have large textures.

Otherwise, tga is a safe bet. It's faster to read/write than png. I usually use tga or sometimes png.

[tashko.zashev]

Hi,

You can use our tool "Image to tiled multiresolution EXR converter".
More info is available here: http://www.spot3d.com/vray/help/rhin...g2tiledexr.htm

[Dariusz Makowski (Dadal)]

Hi,

You can use our tool "Image to tiled multiresolution EXR converter".
More info is available here: http://www.spot3d.com/vray/help/rhin...g2tiledexr.htm

U guys are amazing. Simply best ever devs.

[puha0941]

Hi, Tashko!

Thank you for the link. Could you kindly send me a download link as well? I could not find where to download it from the link you gave me.
It should work fine for Vray for Rhino as well, right? Also, would other tools work for Vray for Rhino?

Hi,

You can use our tool "Image to tiled multiresolution EXR converter".
More info is available here: http://www.spot3d.com/vray/help/rhin...g2tiledexr.htm