white interior

[dmtr]

Guys, I have constant problem with white interiors.

I use daylight+portal but image is very grainy, especially when I print it.

I need sharp sexy image but mine looks dirty instead.

Sampling is maximum and was experimenting increasing FG but that doesnt improve anything. Any ideas why it happens?Thx

[STRAT]

your images look quite blurred and unsharpened, but not grainy. i'm not a MR user, but the non-sharpness of the renders suggest you need to use a different render filter. more contrast would also aide in the perception of crispness.

[dmtr]

thanks, which filter do you recommend? mitchell is fine?

I suspect it has something to do with daylight/sky portals.

Here is fragment rendered using photometric lights and looks much sharper.But not sure...

[Lazarus]

Maybe use a Lanczos filter and set your min/max samples to 4/64.And save your image to a quality output like a 32bit .tga format.

[Justin Hunt]

Also what resolution are you rendering at?

The Glare filter isn't helping either

 

jhv

[Peter M. Gruhn]

One thing I was thinking about is that the whole interior just looks flat. Somebody please offer an opinion - might this be due to not using a linear workflow?

[Justin Hunt]

LWF or not, you still have the ability to play with exposure control's highlight, mid tones and shadows which can really make an image POP and textures look more detailed.

 

remeamber that AA min and Max threasholds are closly tied to contrast. The higher the contrast between pixels results in the Max AA kicking in earlier, where as very low constasts result in more Min AA samples.

 

jhv

[SandmanNinja]

try Min/Max of 1 and 4, or 4 and 16.

Those are pretty high values but should show some sharpening

 

I think I use Box

[amer abidi]

As the fellas mentioned, your image does not seem grainy as much as it lacks in contrast. I think you'll have to fiddle around with your exposure/camera settings to get the result you want.

 

Brighten the whites, Darken the shadows, get more contrast in, along with a sharp filter (Both Mitchel and Lanczos would work fine here), and you'll start gettng a really good image going on.

[Crazy Homeless Guy]

The attached image says a lot. Look at the histogram distribution. It is bunched on the left side, with virtually no information below a 50% gray.

 

The majority of pleasing images will have a distribution that touches both ends, forming a nice curve. It is fine for the curve to be weighted one direction or the other, or in some cases, be relatively flat. However, it should use all of the space.

 

Before I clip the image, I would check the amount of energy your lights are producing if you are using Photons. To much energy will wash out an image, and clipping to get it back doesn't necessarily fix the problem that was present, it just covers it up. At least to some extent.

[dmtr]

Thanks for comments guys.

The res I use is 1536x921, no glare, and sampling is already pushed to the max.

When you talk about the contrast do you mean Exposure controls; Highlights, Midtones and Shadows? Or it's rather post work?

 

How can I get good contrast with exposures, when I increase highlights well lightened areas get burned...any advice how to balance it?

Edited August 26, 2009 by dmtr

[Justin Hunt]

Mid and shadows tones will have the most impact. Get it as good as you can in Max then tweak it in photoshop.

 

Most people confuse contrast with really strong shadows and highlights, where are good contrast is what Strat is pointing out, a good range of information thoughout the shadows, mids and highlights.

 

1536x921 is considered low res, double it when you do your final image

 

jhv

[dmtr]

Many thanks, I will play with that and post an image.