HDRI environtment problem and controling shadow
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@panixia said:
check out the texture tiling options in the background slot to achieve the right image size..
and for soft shadows you can increase the size of the sun (and maybe use higher subdivs)I've already change every setting and get some trial and error.
Starting from increase/decrease value FOV, unthick exposure and vigneting, subdivs, etc for camera setting.
Tiling map on GI and bacgkround doesn't work either. Make lower/higher subdivs on shadows parameter in reflect colour environtment setting.@atlastudio said:
This tutorial is helpful- http://www.youtube.com/watch?v=pqMohzR5mV0
Basically turn on default lights in the Global Switches and put Sunlight plugin into the 'Reflect Colour' slot in Environment settings, then adjust the sun size to get softer shadows and adjust the intensity of sun to suit the scene lighting.
I watch this wonderful tutorial video for several times.
Still get too wide background.
Is there related with VGA card on my old laptop(Travelmate 6292)?
or is HDRI file has to be a big big size pixel (I use 1024 x 768 px).
I have try rendering with HDRI image with 10000 x 5000 px (150 Mb size), it taking long time, but the result more make sense even with only just about 75% viewable background image.Jr
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@masjanu said:
or is HDRI file has to be a big big size pixel (I use 1024 x 768 px).
I don't know Vray, but I think the aspect ratio must be 2:1 for an equirectangular environment in most renderers(?)
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@cotty said:
@masjanu said:
or is HDRI file has to be a big big size pixel (I use 1024 x 768 px).
I don't know Vray, but I think the aspect ratio must be 2:1 for an equirectangular environment in most renderers(?)
You are absolutely correct sir.
Any Equirectangular Spherical Panorama MUST be 2:1 ratio. See my hdri pack for example, there is a free JPEG sample you can play with too, free hdr sample to premium members. (shameless plug
)
Lamps pack | SketchUcation
HDRI pack contains 12 spherical panoramas in both HDR and JPEG format. 24 files in total.
(sketchucation.com)
An IBL by definition should be your method of lighting the scene. There should be no need to subsidise any lighting with the sun or physical sky. The IBL should be your only light source, if you want it to light your scene of course. If the scene is dim then just increase the intensity of the IBL in your rendering engine. I would much rather use an IBL that I need to increase in brightness rather than one which is overexposed to begin with.
You can use the spherical just for background mapping if you like, in which case you add your own sky/lighting method. If you really want to anchor your render into the HDRI, it should really be both the background and the light source as they will match in tone.
One way to reduce your render times is use a hdr of around 4000x2000 pixels to ILLUMINATE the scene and then a high res jpeg of double the resolution as the BACKGROUND. This way you get an ultra sharp background with beautiful light from the hdr. Remember a jpeg will never give the same quality of light as a hdr.
See this example from sculpting master Michalis, he was just using a TEST spherical panorama I made. Look how dramatic the difference is between hdr and jpeg when used as a light source. I know the hdr is higher resolution in this case, but look at the model not the background, its significantly better.
JPEG
HDR
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That's a good result. Wonderful with hdri.
Sir would you please give me the screen shoot of your environtment and camera setting?
I'll try it.Thanks
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I don't use vray, so my setting wouldn't really mean anything to you. Someone on here definitely knows how to load IBL into vray and change intensity/rotation.
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How do you change the size of HDR or focus ?
Some seem too small or out of focus. Some are perfect, yet the same size.Tried to follow some tuts from Twilight but not grasping how to adjust them to scene.
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We're still in the vray forum, right?
The issue with the current version of vray for sketchup is that image based lighting does not produce sharp shadows or full hdr lighting. Hopefully this will be fixed soon with the still pending new beta, but currently the only solution for good shadows is to use the vray sunlight plugin to generate shadows. That's what that link posted earlier in this thread explains for you.
Andy
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That doesn't look to me like a correct mapped hdri image. Doesn't matter if it's big, small, blurred etc. You probably mapped it like "spherical" as type, and it's not a spherical map. Try "angular" instead. Notice that you cannot zoom in the HDRI. It's like you try to make some objects in an image to look closer. When you choose a HDRI, think about your camera position in the scene, how far you are from the object you're rendering, and try to find a HDRI image with similar shooting conditions.
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@stefanq said:
That doesn't look to me like a correct mapped hdri image. Doesn't matter if it's big, small, blurred etc. You probably mapped it like "spherical" as type, and it's not a spherical map. Try "angular" instead. Notice that you cannot zoom in the HDRI. It's like you try to make some objects in an image to look closer. When you choose a HDRI, think about your camera position in the scene, how far you are from the object you're rendering, and try to find a HDRI image with similar shooting conditions.
Yeah, I got an explanation here
- I have to use a match hdri "spherical" map..
- and the camera position has to match with the "fotographer eyes" (I think this the important thing).
I've already try to render with "spherical HDRI map" and try to change the zoom value camera setting, and bingo.....I understanding now (even to match scene with map take a little bit effort for me)
Thank you stefanq,
thank you guys....Jr
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@stefanq said:
That doesn't look to me like a correct mapped hdri image. Doesn't matter if it's big, small, blurred etc. You probably mapped it like "spherical" as type, and it's not a spherical map. Try "angular" instead. Notice that you cannot zoom in the HDRI. It's like you try to make some objects in an image to look closer. When you choose a HDRI, think about your camera position in the scene, how far you are from the object you're rendering, and try to find a HDRI image with similar shooting conditions.
Finally, almost 2 weeks...
I've a little bit understanding about HDRI. I try to browse some free "spherical HDRI map" and match with my model, then apply it to my environment. I get a better result. But, I just thought HDRI was not one of the best environment setting, there is many ways to do it.Thank you so much guys...
Thank you stefanq...Jr
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