Unobtrusive markings using a chlorophyll-based agent

A sports venue comprising:

• a sports field upon which a sport is played, the sports field substantially comprising living grass;
• and
• at least one decoration painted onto the living grass of the sports field using a chlorophyll-based agent,
• wherein the chlorophyll-based agent is non-detrimental to a health of the living greenery,
• wherein the at least one decoration is substantially unnoticeable by persons involved with the sport e the persons are located on the sports field,
• wherein the at least one decoration is substantially noticeable by a plurality of viewers located off the sports field,
• wherein the decoration is only viewable by the plurality of viewers located at a predefined minimum viewing distance and at a height creating a minimum viewing angle,
• wherein the predetermined minimum viewing distance is a minimum distance from the decoration where the living grass painted with the chlorophyll-based agent is visibly distinguishable from and shinier than neighboring untreated living grass,
• where the living grass painted with the chlorophyll-based agent is visibly indistinguishable from and shinier than neighboring untreated living grass when viewed at least one of from a distance less than the predetermined minimum viewing distance and at a height creating a line of sight from horizontal that is below the minimum viewing angle.

A design presentation system comprising:

• a sports field having a substantially large expanse of living grass, wherein the sports field is observable by a plurality of viewers at a distance from the sports field;
• a design;
• and
• a chlorophyll-based agent to paint the design on the living grass of the sports field,
• wherein the chlorophyll-based agent is non-detrimental to a health of the living grass of the sports field,
• wherein when the design is painted on the living grass with the chlorophyll-based agent, the living grass treated with the chlorophyll-based agent to create an image of the design in the living grass by visibly distinguishing treated living grass from and shinier than neighboring untreated living grass only at a predetermined distance and at a height creating a minimum viewing angle,
• wherein the design is not viewable by a sport player located on the sports field, as the sports player is at least one of nearer than a minimum predefined viewing distance and at a height creating a line of sight from horizontal that is below the minimum viewing angle, the minimum predefined viewing distance is a distance along a line of sight from horizontal that is at or greater than the minimum viewing angle, where a difference in shine and color between treated living grass and untreated living grass changes from substantially unnoticeable to noticeable,
• wherein the design is viewable by the plurality of viewers located distant from the sports field as the plurality of viewers are located farther than the minimum predefined viewing distance and at a height creating a line of sight from horizontal that is at or greater than the minimum viewing angle.