"Dirty rendering"

[Hans-Olav]

I remember the discussion from time to time about spots and dirt in ceilings but can't remember any solutions or how to minimise it.

is it a specific setting or something to do with the lighting?

 

 

 

 

[RussU]

While I'm not an expoert in RW, this looks like a global illumination issue, and a light bounce issue. Undersampling secondary bounces.

First thing to check is that there's no "light leaks" in the model, and the geometry all touches nicely, but then up your levels for "Indirect Lighting" and "Environment Lighting". Raising the Bounces / Max Reflections might help too.

Can you post a screen grab of your current RW options?

 

 

[Hans-Olav]

Thanks for the post

here are my settings

Tha

[Hans-Olav]

Hi 

"Indirect Lighting" and "Environment Lighting" is maxed out. Still dirty ceilings 

[RGyori]

You might check out this earlier discussion... HTH

 

 

 

[Hans-Olav]

@RGyori Thanks

That was the discussion I was looking for

[Phil hunt]

Try the settings all on high and knock back the strength of the ambient occlusion 

[Phil hunt]

Hans try turning of sky interior you seem to be picking up some sky colours in your render

[Phil hunt]

Finally didn't know you could have 16 bounces turn it down to 8

[Hans-Olav]

Here are the results after some more  testing 

[RGyori]

@Hans-Olav Glad it worked out for you... and nicely done!

[Phil hunt]

Hans what settings did you finally use.    ?

[Hans-Olav]

Here is my settings

 

59 minutes ago, Phil hunt said:

Hans what settings did you finally use.    ?

p2 interior-ny-2 is the top most picture

@Phil hunt 

I was also tweaking the textures. the curtain is different between the two rendering 

the top most is just plain transparency 

the other one uses a image map for transparency 

 

 

[PVA - Admin]

Note how his reflections are set to 6, this is WAY higher than I have recommended in the past since it doesnt affect the reflectivity appearance all that much beyond 3. Its looking more and more that this option is also controlling how many times light is allowed to reflect, which is supposed to be also controlled by indirect bounces, or at least thats what I had thought. I'm going to be confirming and filing for separate control of this for more efficient renderings.

[markdd]

56 minutes ago, Jim Wilson said:

Note how his reflections are set to 6, this is WAY higher than I have recommended in the past since it doesnt affect the reflectivity appearance all that much beyond 3. Its looking more and more that this option is also controlling how many times light is allowed to reflect, which is supposed to be also controlled by indirect bounces, or at least thats what I had thought. I'm going to be confirming and filing for separate control of this for more efficient renderings.

It would be really helpful to get some clarification from the engineers about this....