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Render Speed Question From New User About Truespace Archives These pages are a copy of the official truespace forums prior to their removal somewhere around 2011. They are retained here for archive purposes only. Render Speed Question From New User // New Users 1  |   Order by default Post by johnhoward // Aug 4, 2006, 8:17am johnhoward Total Posts: 231 Truespace works great until I try to render with skylight. I took a new file, removed all 4 default lights, added 1 skylight and 1 nurbs cube and did not modify any settings for the two. I clicked on Rendering Visibility - Raycast Enable Ray Tracing Rendering Quality High It took 29 seconds to render. Is that slow or fast? When I copied a second cube and dragged it a bit lower on the screen than the first cube, the same render took 60 seconds. Thanks to all of you that have answered my previous questions. John Howard Post by Délé // Aug 4, 2006, 8:27am Délé Total Posts: 1374 Hi John, Yeah, the skylight takes a long time to render. An IBL can produce similar results and can be much faster though the lighting will be in a defined area. If you have TS7 you might want to try HDRI lighting. That can produce nice lighting and shadows. hth Post by splinters // Aug 4, 2006, 11:01am splinters Total Posts: 4148 Can't say I ever used a skylight. I just use an infinite light and tint the colour to suit the time of day. Doesn't slow anything down either. Post by Shike // Aug 4, 2006, 11:08am Shike Total Posts: 511 Aaw, then I must come to the defence of all slow lights ;) 2024 It's a matter of speed vs realism....or using a lot of tricks to get speed&realism (not my area, I only use slow methods:D ) The above result could perhaps be done with one (or a few) weak bluetinted pointlights (or infinite) with soft shadowmapping. Or as Splinters said, only one bluetinted infinite light, but then we go into classic light setups where you might need to place some fill lights and backlights to avoid pitchblack shadowed areas :) Skylight, Arealights, IBL, and HDRI kan give you a realistic softshadow look even with raytraced shadows. They basically achieve this by (not visibly) placing a lot of weak lights over an area, depending on the type of light (plane for arealights, sphere for IBL and HDRI..and eh...hemisphere for skylight?) This is noticed if the light has low settings and raytraced shadows(see image)...then several shadows can be seen. With higher settings the amount of shadows increase and they appear smooth...and since the amount of shadowcasting lights have increased, the render takes longer. I personally ALWAYS use the above mentioned areatype lights with raytraced shadows. Pros: Realistic and shadows appear on the correct places. Cons: Slooooooooooooow ;) Simple lights with mapped shadows can give you a soft look. Pros: Faster Cons: Takes memory, since it basically creates texturemaps, and in complex scenes you might encounter places (especially around smaller objects) where there are no shadows at all.

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