Light blotch issue

[stevebo]

Hey guys.

Got a bit bored today and decided to test different things like the free Arroway textures, and HDRI maps. The Eames Chair is from the Warehouse and I upped the polycount using Subdivide and Smooth.

I used Jackson's technique in blending the Vray Sun and an HDRI image. However, I ended up with this little light blotch in the render. I've had this issue before on other projects but I usually just Photoshop them out. But now I would like to resolve it properly.

I've changed the Color Mapping type from Linear Multiplier to Exponential to HSV Exponential. The light blotch has definitely improved from switching it but has not fully resolved the issue.

Any help would be great!



Edit: thought I'd throw in a Photoshopped version of it too just for kicks

[arqestevez1]

Re: Light blotch issue

do you have a refraction layer on the glass?... if you do, delete it.
very romantic sceene

[stevebo]

Re: Light blotch issue

do you have a refraction layer on the glass?... if you do, delete it.

I did. I've deleted it now, re-rendered but the light blotch happened again!

very romantic sceene

I'm a romantic fella

[stevebo]

Re: Light blotch issue

Anyone?

[Jackson_cg]

Re: Light blotch issue

Have you disabled caustics? I never use caustics for arch viz (not many villas have swimming pools in Sweden ) so I never see these bright spots everyone complains about.

Very nice lighting, just goes to show that good lighting can produce stunning images from even the simplest model.

[stevebo]

Re: Light blotch issue

I haven't got caustics enabled. It's quite strange. Perhaps the sun is too bright?

[fpedrogo]

Re: Light blotch issue

Did you have clamp output disable and subpixel?

[stevebo]

Re: Light blotch issue

I figured it out! It was the Vray sun! :

[DaveReyes]

Re: Light blotch issue

very nice image can you share the settings so you can see the vray sun!

[stevebo]

Re: Light blotch issue

Under the environment tab, for both the GI and Background colour, I set up a blend texture. For the first texture, a standard Sky texture was applied (I changed the size multiplier to 2 for softer shadows). The second texture was an HDRI environment which I got from here. When that is set, under the blend tab, the blend amount is set to 0.99.

[thomthom]

Re: Light blotch issue

I figured it out! It was the Vray sun! :

And with the new version I think you can hide that spot.

[mjm223]

Re: Light blotch issue

Is there anyway to make the Vray Sun look as bright as the sun in the HRDI image? Or does it always look like a simple ball?

[fpedrogo]

Re: Light blotch issue

Is there anyway to make the Vray Sun look as bright as the sun in the HRDI image? Or does it always look like a simple ball?

The sun is always going to look like sphere. The only way to get the HDRI effect is in post processing.
I use this plugin to created Lens effect

http://www.digitalanarchy.com/knollPS/main.html

http://www.digitalanarchy.com/knollPS/new30.html

Best

[saghisweety]

Re: Light blotch issue

hi guys im new there,i have many problem with renderig my scene ,i creat a small house with interior disgne,texture,bump,displcement..ecc, i need to set a light to creat a realistic house but i dont know how!! i see some guys that creat nice scene with v-ray for su ,i have sktchup 7,and latest v-ray demo.

pls help me if have some tutorial or setting render option for realistic rendering.

advance thx

[thomthom]

Re: Light blotch issue

hi guys im new there,i have many problem with renderig my scene ,i creat a small house with interior disgne,texture,bump,displcement..ecc, i need to set a light to creat a realistic house but i dont know how!! i see some guys that creat nice scene with v-ray for su ,i have sktchup 7,and latest v-ray demo.

pls help me if have some tutorial or setting render option for realistic rendering.

advance thx

Please start a new topic for this. Thread gets confusing otherwise.