Forum Coordinators: RedPhantom
Poser - OFFICIAL F.A.Q (Last Updated: 2024 Nov 09 3:34 pm)
Very interesting postapulcino.
I presume you have seen shademaster's Poser 4 renderupgrade in freestuff which simulates HDRI using one supplied image.
Your app looks like it maps the light sphere to a rectangular map allowing colour gradiation on the map and corresponding lights.
Can you integrate the colour picker tool with this? Can the rectangular map take imported bitmaps/jpegs etc.?
If I can make one further comment, that is an awfull lot of lights in that array. Render time must be very high. Do you plan the app to use a standard array size e.g. 80 lights or will this be variable?
Otherwise this looks very good.
Regards
STORM
Attached Link: http://www.debevec.org/
For all your HDRI needs :) Be sure to check out the short film "Fiat Lux" while you're there, it's truly gorgeous. later jbHi postalpucino !
it sounds interesting...but I don't understand why you call this application "HDRI light studio".
HDRI (High Dynamic Range Imaging) is an image format that encodes proportionaly the amount of light as floating point number instead of "colors". This is a more accurate physical model as you can have an "infinite" light intensity (from a very weak light source to a bright sunshine). With normal 8 bit low dynamic range image (jpg, bmp, etc...) you're limited to 255 shades for 3 channels (RGB).
Poser's illumination model use low-dynamic range (8 bit) value. Even if you use an HDRI light probe to set the intensity of lights, it will be limited by Poser's 8 bit format. Whatever you'll do, it's impossible to create or use HDR image in Poser.
What you are proposing here is "image based" lighting. This method - used mostly with radiosity rendering engine - has nothing to do HDRI. It's only a global illumination method...
But, hey, image based lighting in Poser is already great !
:) Eric
Um... have you actually tried this? As a programmer I know that each poly will have to be lit by each light even in preview mode. My experience with poser is past like 4 lights or so your performance, even in preview mode goes down. That is a heck of a lot of light calculations and even more with shader nodes. What do you have like a 100 lights there? That's at least 100 dot products per vertex to calc lighting. Plus shader nodes that rely on light direction etc can even do dot products at pixel resolution per light. Well I hope it works but I don't think poser makes any distinction between static and dynamic lighting.
Mason, I regularly render with 20-35 lights in a scene for simulated GI. From what I see above, the system allows you to control the number of lights horizontally and vertically, thus enabling you to have,say, only 2x2 lights if you want a "quick render" GI, or, say, 7 x 6 lights, for a 42 light incredibly detailed GI setup.
Remember, kids! Napalm is Nature's Toothpaste!
Valandar I know the system allows it. I haven't tried it myself but my experience with programming graphics apps and using poser is the more lights, the slower the system. I'm just wondering if this has slowed down the system. I would imagine it does unless CL has some way to compute 100s of dot products as quick as 4 or 8.
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