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#DAYLIGHT SHADOWS IN CHEETAH 3D HOW TO#
#DAYLIGHT SHADOWS IN CHEETAH 3D DOWNLOAD#

To make them less sharp increase to 5 or 6 However, to make shadows sharper decrease the amout to 2 or 3. Decreasing the Map Size and increasing the Sample Range and / or Fall Off (Directional parameters rollout) will make shadows less sharp: On a large site the size should go up accordingly (not above about 5000) and a smaller site down to 512.

Size - Set to 3000 - this is the size of pixels of the shadow 'map' (or image) used for the shadows.

Shadow Map Parameters rollout > Bias - Set to 0 - this changes how far the base of a shadow is from the object.

Shadow Parameters rollout > Click the colour swatch next to Color and change the colour to very dark grey instead of black.

Turn this off for now and use it later if required NOTE: MAX and VIZ are different in the exposure control settings in that VIZ defaults to Logrithmic exposure control On but MAX defaults to None.

Environment dialog > Exposure Control rollout > set this to None if Logrithmic Exposure Control is selected.

The Sunlight will then be positioned in the sky as it would be in Birmingham on August 20th at 11.00am In the City list pick a City (Birmingham UK for example).

Press Get Location and in the Map dropdown list pick Europe.

Control Parameters > Set the time to 11.00 am, the month to 8 and the day to 20.

Throughout the next steps test render the scene at each stage.

Left click to finish the Sunlight creation.

Try to keep the Falloff size as close to the Hotspot size as possible (there is always a small discrepancy) Adjust the Falloff similarly, but this time move it down to decrease the size of the Hot Spot. If this goes to far from the edges of the site the shadows will become less sharp.

Move the Hot Spot spinner up until the Sunlight cone just surrounds the site to be illuminated.

Directional Parameters rollout > Light Cone > make sure Show Cone is checked and Overshoot is unchecked.

Efficiency in rendering time is therefore greatly increased

#DAYLIGHT SHADOWS IN CHEETAH 3D HOW TO#

This tutorial shows you how to configure Shadow Mapped Shadows to reproduce the effect of ray traced shadows. However, for infrastructure and landscape work where the scene 'load' can be great this type of shadow can have major effect on rendering times. NOTE: The Ray Traced Shadows option calculates accurate and fine shadows. General Parameters rollout > Shadows - Set this to Shadow Map.To optimise the sunlight for rendering quickly change the parameters of the Sunlight in the Modify Panel thus: This will display the basic effects of the sunlight in the viewport Viewport Configuration dialog > Uncheck Default Lighting if this is checked.To see the effects of changes in sunlight parameters test render the scene at each stage This is an unfortunate effect of the Daylight System so the Scene's default lighting needs to be used to view the scene comfortably in the viewport. NOTE: Notice that in the User viewport the scene is 'bleached'. Drag the Sunlight so that it just disappears from the viewport This will extend a Sunlight object away from the site into the sky. Take the left finger off the left mouse button and drag the mouse down.In the top viewport left click and drag at the centre of the site to create a Compass helper object just big enough so that it can be seen easily.Create Panel > Systems press Sunlight - the cursor turns into a small cross.In the Top viewport zoom out so that the site is in the centre of the viewport and occupies about one quarter the space available.Top of page Place a Sunlight System in the scene and configure Please read the sample data instructions before downloading. In order to follow this tutorial, you may want to use the supplied files.

#DAYLIGHT SHADOWS IN CHEETAH 3D DOWNLOAD#

NOTE: Refer to the MAX/VIZ Help for extensive notes on use of IES Sun, IES Sky or a Texture Sky Download Sample Data This basic setup and settings routine can be fine tuned depending on the effect required New users can use this routine as a 'good start' and it will help them understand what settings effect the lights and shadows. The following routine sets up a standard Sunlight System (this uses a target direct light), including ambient light and standard shadow map settings.