5/7/2024 0 Comments Hdri image vray sketchupRemember that a JPEG will never provide the same level of light quality as an HDR. By using an HDR, you can achieve an ultra-sharp background with beautiful light. One way to reduce render times is to use an HDR of around 4000x2000 pixels to illuminate the scene, and then a high-resolution JPEG of double the resolution as the background. If you want to anchor your render into the HDRI, it's recommended that it serve both as the background and light source. They will match in tone, ensuring a more realistic representation. You can use the spherical map just for background mapping if you prefer, in which case you'll need to add your own sky/lighting method. I would rather use an IBL (Image-Based Lighting) that needs to be increased in brightness rather than one that is overexposed from the start. If the scene is dim, simply increase the intensity of the IBL in your rendering engine. The IBL should be your only light source if you want it to illuminate your scene. There's no need to supplement any lighting with the sun or physical sky. In fact, by definition, an IBL should be your method of lighting the scene. Take a look at my HDRI pack for example; there's even a free JPEG sample you can play with (premium members only). ![]() ![]() I'm not familiar with Vray, but I believe that in most renderers, the aspect ratio for an equirectangular environment must be 2:1. Additionally, any Equirectangular Spherical Panorama MUST have a 2:1 ratio. ![]() Masjanu mentioned that an HDRI file can have a large pixel size (he uses 1024 x 768 pixels).
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