diffuse & rake lighting
DESCRIPTION
Diffuse & Rake Lighting. Bio 498/698. Outline. Issues with shiny, metallic specimens (diffuse) or highly textured surfaces (rake) Lighting Intensity options Useful Equipment: Modeling Lights Diffusers Styrofoam cutouts. Issues with Shiny, Metallic Specimens. - PowerPoint PPT PresentationTRANSCRIPT
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Diffuse & Rake LightingBio 498/698
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OutlineIssues with shiny, metallic specimens
(diffuse) or highly textured surfaces (rake)Lighting Intensity optionsUseful Equipment:
Modeling LightsDiffusersStyrofoam cutouts
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Issues with Shiny, Metallic SpecimensIn images with shiny, metallic specimens,
using lighting equipment and techniques is important because:Areas of the image can be over-exposedAreas of the image can be under-exposedBackground shadowsOften lighting set-ups will be different for each
individual specimen
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Modeling Lights and IntensityFull and Half and Full PV Intensity
Ex. Modeling Light position 1
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Modeling Lights and IntensityHalf and Half and Full PV Ex. Modeling Light position
1
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Modeling Lights and IntensityEx. Modeling Light position 2Half and Half and Full PV
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Modeling Lights and IntensityHalf and Quarter and Full PV Ex. Modeling Light position 2
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Modeling Lights and IntensityQuarter and Quarter and Full PV Ex. Modeling Light position 2
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Ex. Modeling Light position 2Quarter and Quarter and PV turned down 2 times
Modeling Lights and Intensity
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Ex. Modeling Light Position 3Quarter and Quarter and PV turned down 2 times
Modeling Lights and Intensity
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Quarter and Quarter and PV turned down 2 times
Ex. Modeling Light Position 4
Modeling Lights and Intensity
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Additional Lighting Tricks (Diffusers)
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Diffusion Cylinders + Styrofoam Cutout
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Additional Lighting Tricks (Diffusers)Quarter and Quarter and PV turned down 2 times + Diffuser Ex. Modeling Light Position 4
Without changing your lighting intensity or equipment, adding a diffuser will cause your overall image to become darker.
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Additional Lighting Tricks (Diffusers)Quarter and Quarter and Full PV+ Diffuser Ex. Modeling Light Position 4
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Additional Lighting Tricks (Diffusers)Quarter and Half and Full PV + Diffuser
Ex. Modeling Light Position 4
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Additional Lighting Tricks (Styrofoam cutouts)
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Additional Lighting Tricks (Styrofoam cutouts)
Quarter and Half and Full PV + Diffuser + Styrofoam cutout
Ex. Modeling Light Position 4
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Additional Lighting Tricks (Styrofoam cutouts)
Half and Full and Full PV + Diffuser + Styrofoam cutout
Ex. Modeling Light Position 4
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ConclusionAdding diffusers and Styrofoam cutouts will
decrease your lighting intensityDiffusers and styrofoam cutouts provides a
more even lighting for a shiny, reflective specimen
Additional information: http://www.visionarydigital.com/Support.html
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Bio 498/698
Raking Light(Textured Specimens)
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OutlineTextured InsectsWhat are raking lights?Using a Diffusion Cylinder with a Styrofoam
cutoutUsing raking lights for textured specimens
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Textured InsectsWith specimens
that have a lot of texture, lighting and being able to emphasize the texture becomes tricky
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What is a Raking light?Raking light = the illumination of objects
from a light source that is at an oblique angle or almost parallel to the surfaceThis technique provides photographic
information on the texture of the specimen, ie ridges along a beetle’s back.
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Top-down view of specimen with raking light setup
Specimen
Modeling light with diffuser (raking light)
•Raking light should be setup so that light is perpendicular to the texture’s direction
Texture direction
Diffuser
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Raking LightPut a diffuser on one of the
lightsAngle the light w/ diffuser so
that it is closer to the specimen in a perpendicular angle to the texture
Angle the light w/out diffuser facing towards the ceiling
W/out diffuser
W/ diffuser
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Diffusion Cylinders + Styrofoam Cutout
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Raking Light with Diffusion Cylinders + Styrofoam Cutout
•Diffusion cylinders + Styrofoam cutouts are useful for creating a more even light – especially for shiny specimens
•For specimens with texture, this often minimizes or does not accurately represent the texture.