Author Topic: Pixelated diffuser pin  (Read 6327 times)

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Offline number12

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Pixelated diffuser pin
« on: May 21, 2013, 05:11:52 pm »
Hi guys, when I add a rectangular diffuser pin light the edges seem to look really pixelated, this also carries over to the rendering. Why is this and how can I stop it please?

guest84672

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Re: Pixelated diffuser pin
« Reply #1 on: May 22, 2013, 07:25:43 am »
Did you save the HDRI or select "generate high resolution image for KeyShot" under the EDIT  menu of the editor?

Offline number12

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Re: Pixelated diffuser pin
« Reply #2 on: May 22, 2013, 11:42:03 am »
Hi Thomas, I saved the HDRI file which I had initially created by blacking out the "startup" scene then adding my own pins. I wasn't aware of the "generate high resolution image for Keyshot" option before. Sounds as though that should fix this though, thanks.

Offline number12

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Re: Pixelated diffuser pin
« Reply #3 on: May 29, 2013, 11:47:12 am »
Actually, it didn't resolve it, I was working with another scene, again created custom pins, one of which was a rectangular (like a diffused light box) the edges on the reflection of the object again were jagged even though I used the "generate high resolution for Keyshot"..

guest84672

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Re: Pixelated diffuser pin
« Reply #4 on: May 29, 2013, 11:47:55 am »
What is the resolution of the HDRI?

Offline number12

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Re: Pixelated diffuser pin
« Reply #5 on: May 29, 2013, 02:36:32 pm »
When it was being saved (the high res for Keyshot) I think it said 1000x2000pixels.

guest84672

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Re: Pixelated diffuser pin
« Reply #6 on: May 30, 2013, 06:53:32 am »
This is probably the reason for the pixelation. You need a higher resolution than that.

Offline br3ttj

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Re: Pixelated diffuser pin
« Reply #7 on: May 30, 2013, 07:17:12 am »
Number 12,

I had the exact same issues as you, and DriesV helped clue me in on how reduce the pixilation.  It's a 2 step process to set-up the HDRI with custom pins, save/export it and reimport it to get the clean HDRI reflections you're seeking.  Here's a link to my previous post on the topic along with some visuals:  http://keyshot.com/forum/index.php/topic,5433.msg24041.html#msg24041

It'd be a nice in future KeyShot release, if you could dial the resolution in "on-the-fly" versus having to save and reimport the HDRI.

Offline number12

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Re: Pixelated diffuser pin
« Reply #8 on: June 07, 2013, 08:22:38 am »
Hey thanks br3ttj, I will look at that, constructive help. Thank you!

Offline number12

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Re: Pixelated diffuser pin
« Reply #9 on: June 07, 2013, 08:52:39 am »
OK tried this, I'm sure it would have fixed my issue but now every time I go to edit my pins on the blank HDRI Keyshot crashes.... >:(.  What now??

Offline br3ttj

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Re: Pixelated diffuser pin
« Reply #10 on: June 07, 2013, 10:13:43 am »
number12

I hadn't tried DriesV's blank HDRI.  However, you can quickly get the same result by starting with any of KeyShot's HDRI's.  Just open the HDR editor and under "Adjustments" turn the brightness all the way, or nearly all the way down and then start creating your desired pins.  Personally, I like using the default studio lighting and not turning it all the way off, to achieve a nice ambient light.  Then I add pins both for lighting, but in particular for reflections.